Bug Tool-tip remains visible(switch to another program) fixed.
"new CustomPopupPlacementCallback" and "new EventHandler" removed.
Instead of Application.Current.MainWindow used DynamoView.
Merge branch 'Sitrus2' into DUI-Bug_TooltipVisible(SwitchToAnotherProgram)
Comment updated.
Merge pull request #2254 from vmoyseenko/DUI-Bug_TooltipVisible(SwitchToAnotherProgram)

DUI: Bug Tool-tip remains visible(switch to another program)
LibraryView is scrollable now.
Renamed lists in StandardPanel
Long names were truncated.
Refactored convertor FullyQualifiedNameToDisplayConverter.
Refactored .xaml a little bit.
Disable the links in the tooltip.
Bind to topCategoryList is done in DataContextChanged event handler
Only one category can be selected.
Added comments for clarifying the idea of changes
Icon titles are generating.
temp commit. i don't know how to run test...
Merge pull request #2286 from vmoyseenko/DUI-DisableLinksInTooltip

MAGN-4377: Disable the links in the tooltip
InsertSpacesToString added to Dynamo.Nodes.Utilities, also used methods from stackoverflow article.
Comments.
Merge pull request #2283 from vmoyseenko/DUI-LibraryScrollable(using-mouse-wheel)

MAGN-4380: The library should be scrollable using middle mouse wheel.
Binding refactored.