In RecursivelySort added part about classes.
first renamed into top
Comment updated.
Tooltip for SearchView added.
Search is done for addons
Merge pull request #118 from vmoyseenko/DUI-ClassesMustBeAtTopLvl

DUI: Classes must be always at top of panel
Merge pull request #121 from vmoyseenko/DUI-TooltipForSearch

DUI: Tooltip for LibrarySearchView.
Merge pull request #124 from vmoyseenko/DUI-SearchForAddons

Make Search for Addons