viewSelector: Make the start search event available to input methods

Since we now use the capture phase to feed events into the input
method, we must set the capture flag for the event that starts
searches so that IMs can get at it.

https://bugzilla.gnome.org/show_bug.cgi?id=684040

js/ui/viewSelector.js

@@ -311,7 +311,7 @@ const ViewSelector = new Lang.Class({
 
     startSearch: function(event) {
         global.stage.set_key_focus(this._text);
-        this._text.event(event, false);
+        this._text.event(event, true);
     },
 
     // the entry does not show the hint