Combo chart with datetime axis and line/bar/area as a first series and scatter series as a second one throws InvalidCastException.

This can happen both with opening an xlsx file with such a chart or creating it in code. Such a chart cannot be created with the Insert Chart dialog (combo type is not yet supported via UI).

Cell Values disappearing when RadWindow is dragged to a second Monitor.

Workaround:

private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
    this.viewModel.OpenSampleCommand.Execute(null);
    radDocking1.ToolWindowCreated += RadDocking1_ToolWindowCreated;
}

private void RadDocking1_ToolWindowCreated(object sender, Telerik.Windows.Controls.Docking.ElementCreatedEventArgs e)
{
    var window = e.CreatedElement as ToolWindow;
    if (window != null)
    {
        window.WindowStateChanged += Window_WindowStateChanged;

    }
}

private void Window_WindowStateChanged(object sender, EventArgs e)
{
    var window = sender as ToolWindow;

    var spreadsheet = window.ChildrenOfType<RadSpreadsheet>().FirstOrDefault();
    if (spreadsheet != null)
    {
        spreadsheet.InvalidateVisual();
    }
}

RadSpreadsheet exposes API enabling the users to control the visibility of the sheet selector:

RadSpreadsheetSheetSelector.SetIsSheetSelectorVisible(radSpreadsheet, isVisible);

When the SetIsSheetSelectorVisible method is invoked with false value for the isVisible parameter, its parent container is still visible in the UI.

The named ranges are not updated after rows columns are inserted.

When attaching to the CellPropertyChanged event and trying to modify the cell an exception is thrown:

if firstly detached from the event and then modify the cell the exception is: 
System.InvalidOperationException: 'Collection was modified; enumeration operation may not execute.' 

else:
System.StackOverflowException: 'Exception of type 'System.StackOverflowException' was thrown.'

Please add support for cell content rotation.

I know that this is listed in the known unsupported features article, but just to be extra clear about what I am requesting, here's an example from Microsoft Excel

When the column width is decreasing below the size of the filter button the size of the button remains the same and overlaps the previous button.

Hello, 
we have an Excel export in our software that we solved via Telerik Spreadsheet. 
An exported Excel Table can also contain images. 
These pictures are inserted as shape objects. 
The Placement Property is set to xlMove (xlPlacement Enum) in Excel. 
If you now filter the data in Excel, the images remain and are not hidden. 
We therefore need a way of being able to change this Placement Property to the Value xlMoveAndSize
It would be very desirable if this option were made available in Telerik Spreadsheet as our customers urgently need it.

The scroll exceeds the visible area when using the auto-fill.

Steps to reproduce:

- Set the VisibleSize to (10 ,10)

- Drag the autofill icon down