Qt: improved Qt themes. Added tab drawing.


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43146 4005530d-fff6-0310-9dd1-cebe43e6787f
dockmanager: convert resources to RES

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43147 4005530d-fff6-0310-9dd1-cebe43e6787f