Object Inspector: Remove code that prevents SpeedButton background erase. Patch from Sandro Cumerlato.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46975 4005530d-fff6-0310-9dd1-cebe43e6787f
Object Inspector: Fix resizing selected edit after horizontal resize, remove useless Invalidate. Patch from Sandro Cumerlato.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46976 4005530d-fff6-0310-9dd1-cebe43e6787f