Fix for selection box dragged out of canvas.

Fix for User gets stuck in selection mode when selection box is dragged
out of canvas.
Toggle and highlight assemblies that are node libraries
Deserialize/serialize node library names
Update installed packages UI to represent masked packages
Fix mistake in HasAuthenticator
Various minor fixes
Fix MAGN-5082 Dynamo does not notice if a change (delete or move) has occurred to an import instance
Fix for Selection box dragged out of canvas

Commented the mouse leave event on WorkspaceView.
Fix for selection box dragged outside the canvas

Removed the mouse leave event on Workspace view.
Captured the mouse event on LeftButtonDown and  released the mouse
capture on LeftButtonUp. This will ensure that selection is not lost
even when the mouse is dragged outside the canvas.
Handled the mouse lost focus event on DragCanvas. This will ensure that
selection is removed if the mouse is released outside the canvas.
MemberTemplate created.
Tooltip for members is done.
Margin for member added.
Comment added.
Margin removed.
Centering added.
Margin of icon complete.
OnExpanderCollapsed added to treeviewitem to collapse opened classes, when category is closed.
Members are moved from class to namespace
Merge remote-tracking branch 'remotes/origin/Sitrus2' into DUI-OpenOneCategotyAtATime
Added comments