Using the FastForward feature crashes Test Studio.

Steps to Reproduce:
1. Open a project in Test studio
2. Open an existing manual test or create a new one
3. Click the Fast forward test button 
4. Choose Web test

5. Start creating some steps using clicks instead of pressing Enter (you may need to click more intensively in order to repro)

6. Test Studio crashes.


Providing the log below:

[12/09 13:55:16,Telerik.TestStudio.exe(800:1),Uncategorized] Orchestrator._iUIProject_TestSelected() : Test 'ManualTest' selected.
[12/09 13:55:50,Telerik.TestStudio.exe(800:1),Error] App.LogUnhandledException() : EXCEPTION! (see below)
     Situation: Unhandled exception!
     Outer Exception Type: System.NullReferenceException
     Message: Object reference not set to an instance of an object.
     HRESULT: 0x80004003 (Official ID (if app.) = E_POINTER, Error Bit = FAILED, Facility = FACILITY_NULL, Code = 16387)
     Call Stack:
          at ArtOfTest.WebAii.Design.UI.TestExplorerController.CanExecute(ICommand command, Object parameters)
          at ArtOfTest.WebAii.Design.UI.TestExplorer2.CommandBinding_CanExecute(Object sender, CanExecuteRoutedEventArgs e)
          at System.Windows.Input.CommandBinding.OnCanExecute(Object sender, CanExecuteRoutedEventArgs e)
          at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
          at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
          at System.Windows.Input.CommandManager.OnCanExecute(Object sender, CanExecuteRoutedEventArgs e)
          at System.Windows.UIElement.OnCanExecuteThunk(Object sender, CanExecuteRoutedEventArgs e)
          at System.Windows.Input.CanExecuteRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
          at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
          at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
          at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
          at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
          at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
          at Telerik.Windows.Controls.RadContextMenu.OnEventFired(Object sender, RoutedEventArgs args)
          at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
          at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
          at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
          at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
          at System.Windows.Input.RoutedCommand.CriticalCanExecuteWrapper(Object parameter, IInputElement target, Boolean trusted, CanExecuteRoutedEventArgs args)
          at System.Windows.Input.RoutedCommand.CanExecuteImpl(Object parameter, IInputElement target, Boolean trusted, Boolean& continueRouting)
          at System.Windows.Input.RoutedCommand.CriticalCanExecute(Object parameter, IInputElement target, Boolean trusted, Boolean& continueRouting)
          at Telerik.Windows.Controls.RadMenuItem.CanExecuteApply()
          at Telerik.Windows.Controls.RadMenuItem.OnCommandParameterChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
          at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
          at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
          at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
          at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
          at System.Windows.Data.BindingExpression.Activate(Object item)
          at System.Windows.Data.BindingExpression.OnDataContextChanged(DependencyObject contextElement)
          at System.Windows.Data.BindingExpression.HandlePropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
          at System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
          at System.Windows.Data.BindingExpression.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
          at System.Windows.DependentList.InvalidateDependents(DependencyObject source, DependencyPropertyChangedEventArgs sourceArgs)
          at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
          at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
          at System.Windows.TreeWalkHelper.OnInheritablePropertyChanged(DependencyObject d, InheritablePropertyChangeInfo info, Boolean visitedViaVisualTree)
          at System.Windows.DescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
          at System.Windows.DescendentsWalker`1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
          at System.Windows.DescendentsWalker`1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
          at System.Windows.DescendentsWalker`1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
          at System.Windows.DescendentsWalker`1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
          at System.Windows.DescendentsWalker`1.IterateChildren(DependencyObject d)
          at System.Windows.DescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
          at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
          at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
          at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
          at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
          at ArtOfTest.WebAii.Design.UI.TestExplorer2.RadContextMenu_Opened(Object sender, RoutedEventArgs e)
          at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
          at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
          at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
          at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
          at Telerik.Windows.Controls.RadContextMenu.OnOpened(RadRoutedEventArgs e)
          at Telerik.Windows.Controls.RadContextMenu.OnOpened()
          at Telerik.Windows.Controls.RadContextMenu.OnPopupOpened(Object source, EventArgs e)
          at System.Windows.FrameworkElement.RaiseClrEvent(EventPrivateKey key, EventArgs args)
          at System.Windows.Controls.Primitives.Popup.OnOpened(EventArgs e)
          at System.Windows.Controls.Primitives.Popup.CreateWindow(Boolean asyncCall)
          at System.Windows.Controls.Primitives.Popup.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
          at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
          at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
          at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
          at System.Windows.Data.BindingOperations.SetBinding(DependencyObject target, DependencyProperty dp, BindingBase binding)
          at Telerik.Windows.Controls.RadContextMenu.CreateRootPopup(Popup popup, FrameworkElement child)
          at Telerik.Windows.Controls.RadContextMenu.HookupRootPopup()
          at Telerik.Windows.Controls.RadContextMenu.OpenPopup()
          at Telerik.Windows.Controls.RadContextMenu.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
          at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
          at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
          at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
          at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
          at Telerik.Windows.Controls.RadContextMenu.TriggerEventFired()
          at Telerik.Windows.Controls.RadContextMenu.OpenContextMenu(Object sender, EventArgs e)
          at Telerik.Windows.Controls.RadContextMenu.RoutedEventFired(Object sender, RoutedEventArgs e)
          at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
          at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
          at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
          at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
          at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
          at System.Windows.Controls.PopupControlService.RaiseContextMenuOpeningEvent(IInputElement source, Double x, Double y, Boolean userInitiated)
          at System.Windows.Controls.PopupControlService.ProcessMouseUp(Object sender, MouseButtonEventArgs e)
          at System.Windows.Controls.PopupControlService.OnPostProcessInput(Object sender, ProcessInputEventArgs e)
          at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(ProcessInputEventHandler postProcessInput, ProcessInputEventArgs processInputEventArgs)
          at System.Windows.Input.InputManager.ProcessStagingArea()
          at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
          at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
          at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
          at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
          at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
          at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
          at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
          at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
          at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)