Merge pull request #71 from phillip-hopper/BL-514

BL-514: Add Linux *.bloomCollection file association
Force paint of buttons with better tooltip by enable/disable

This is more of a hack than a solution.  On Linux, the buttons
are not getting repainted when they have a disabled tooltip.
BL-348
Merge pull request #96 from andrew-polk/BL348_EditButtonsNotPainting

Force paint of buttons with better tooltip by enable/disable