It looks like keyboard events are processed incorrectly.

Several fixed (not finished yet):

1. Map ascii symbols to themselves.
2. Mask keymodifiers (otherwise there are some non zero flags even if no modifier key is pressed).
3. Looks like not every map-raised window receives focus - as this is never described, I guess 
   a window with override redirect does not receive a focus when raised (otherwise menu keybindings would
   never work in ROOT).


git-svn-id: http://root.cern.ch/svn/root/trunk@47478 27541ba8-7e3a-0410-8455-c3a389f83636