[gnome-shell] appDisplay: Support the 'excluded-apps' key for app folders

[Jasper St. Pierre <jstpierre src gnome org>]

commit bb8397b9b167c95d6055fe172c1a644a7c1e2498
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Jan 28 12:27:22 2014 -0500

    appDisplay: Support the 'excluded-apps' key for app folders
    
    https://bugzilla.gnome.org/show_bug.cgi?id=723179

 js/ui/appDisplay.js |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index ec71ad0..748537d 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -1075,8 +1075,12 @@ const FolderIcon = new Lang.Class({
 
         this.view.removeAll();
 
+        let excludedApps = this._folder.get_strv('excluded-apps');
         let appSys = Shell.AppSystem.get_default();
         let addAppId = (function addAppId(appId) {
+            if (excludedApps.indexOf(appId) >= 0)
+                return;
+
             let app = appSys.lookup_app(appId);
             if (!app)
                 return;