[gnome-shell] Add missing "return true" from event handler

[Colin Walters <walters src gnome org>]

commit b199ca25180dd2719c2813e3f477ea2e603c862b
Author: Colin Walters <walters verbum org>
Date:   Wed Apr 8 16:06:11 2009 -0400

    Add missing "return true" from event handler
---
 js/ui/overlay.js |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/js/ui/overlay.js b/js/ui/overlay.js
index 2a93681..7717156 100644
--- a/js/ui/overlay.js
+++ b/js/ui/overlay.js
@@ -225,6 +225,7 @@ Sideshow.prototype = {
                     me._setMoreAppsMode();
                 else
                     me._setMoreDocsMode();
+                return true;
             }
             return false;
         });