This fixes all X11 based VCL plugins to move display
initialization  into AfterAppInit (gen, TDE, KDE4),

This is done by moving input method and display into
SalXLib, so they are available in AfterAppInit.

Otherwise the configmgr service won't be available in
SalDisplay::BestVisual.

Change-Id: I9380075b9770bceb8f453bbcb7fe31291634ff89