IsSelected now bound in two ways.
Remove dead comment.
get and set for Parent was rewritten.
Removed excess converting.
Returned to initial point
Event for TreeViewItem is added
WPF.FindChildren is implemented
Merge branch 'Sitrus2' into DUI-OpenOneClassForOneCategory(include-nested-classes)
Added additional functions to LibraryWrapPanel
Fully implemented algorithm of switching active StandardPanel
Some comments are added
Comments addressed
FindChildren function documentation is synced with it signature
Merge pull request #174 from vmoyseenko/DUI-OpenOneClassForOneCategory(include-nested-classes)

DUI: open one class for one category