Fix for mouse wheel skips a section bug (issue #114)
Fix for mouse wheel skips a section bug (issue #114)

Stopping the propagation of the mouse wheel scroll event
if getMouseWheel() finds a result to return fixes this
problem.  (This is just a quick fix - the event shouldn't
be handled twice in the first place.)

htem/CATMAID,fzadow/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,htem/CATMAID,fzadow/CATMAID