Usablity:

Textbuttons: double click now selects entire words (like on file path segements)
Triple click was requested too, but that's not a WM event type yet.



git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57280 954f8c5b-7b00-dc11-b283-0030488c597c