Code review comment for lp:~quequotion/slingshot/fix-1635776

I really didn't write this well; /omitted details/:

This behavior is not affected (for me) with the "im_context_filter_keypress (event)" patch /against slingshot/. In vanilla wingpanel scrolling /in vanilla slingshot/ is broken for me (and possibly other users running wingpanel/+slingshot/ without gala), in wingpanel-standalone scrolling /in vanilla slingshot/ works; in /vanilla/ wingpanel with only the "im_context_filter_keypress (event)" patch /against slingshot/ scrolling still does not work (for me, and aparently everyone else).