Renamed lists in StandardPanel
Bind to topCategoryList is done in DataContextChanged event handler
Added comments for clarifying the idea of changes
Implemented whole code of lists arrangement
Styles switching for headers (no convertors)
Literals moved to constants
Descriptive comments are provided
Merge remote-tracking branch 'remotes/origin/Sitrus2' into DUI-ArrangeMemberGroupsDependAvailability
Used Any() instead of Count. Methods started from capital letter
Merge pull request #36 from vmoyseenko/DUI-ArrangeMemberGroupsDependAvailability

Arrange member groups depending on their availability
Merge remote-tracking branch 'remotes/origin/Sitrus2' into DUI-LibraryContainerInt2