Code review comment for lp:~jeremywootten/slingshot/fix-1213321

+ /*
+ Overriding the default handler results in infinite loop of error messages
+ when an input method is in use (Gtk3 bug?). Key press events are
+ captured by an Event Box and passed to this function instead.
+
+ Events not dealt with here are propagated to the searchbar by the
+ usual mechanism.
+ */