Favorites: breakpoints nodes become collapsed after breakpointsChanged() event
[by:cdr] IDEA-103510 LineSeparatorPanel overbloating in status bar

Registering line separators panel for disposing with other default status bar widgets
Assert message added in loadBranches method.
@NotNull annotations added.
Unnecessary "this" removed.
Move tag command execution from AWT to Backgroundable.Task

*Collect  information about tags before showing dialogs
*Add nested class  in HgUiUtil for store branch and tags information
*Update error message
Use standard dimension keys
allow shift + mouse click open files in new windows
Fix drag & drop [fix-29653]