Currently, vertical scrolling with the mouse wheel doesn't work when the mouse is over the child RadPanelBarItems and no scrollbars are displayed for the child items (IsScrollViewerInsideItemsEnabled=False). This happens because they are hosted in a ScrollViewer which handles the MouseWheel event. Make it possible for the mouse wheel to propagate to the parent ScrollViewer.

Possbility to have PanelBarItems with fixed height and other PanelBarItems that take the rest of the available height equally

Current behavior:

http://admin.telerik.com/Images/editor/Silverlight/PanelBar/31-08-10/current_outcome.png

Expected behavior:

http://admin.telerik.com/Images/editor/Silverlight/PanelBar/31-08-10/desired_outcome.png

ICommandSource for RadPanelBarItem, using the same principle like RadMenuItem, since RadPanelBar is mostly used as a menu.