remoteSearch: Actually return icons

Since commit 3b1330880f, a remote search result's createIcon() method
no longer returns the created icon, whoops ...

https://gitlab.gnome.org/GNOME/gnome-shell/issues/249

js/ui/remoteSearch.js

@@ -295,7 +295,7 @@ var RemoteSearchProvider = new Lang.Class({
                                name: metas[i]['name'],
                                description: metas[i]['description'],
                                createIcon: size => {
-                                   this.createIcon(size, metas[i]);
+                                   return this.createIcon(size, metas[i]);
                                },
                                clipboardText: metas[i]['clipboardText'] });
         }