AppAdmin UI improvements

Squashed commit of the following:

commit 9d9999a77eebdfebfe3e5ba98d506b4702d6d588
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Apr 29 15:33:44 2013 +0200

    Minor adjustment in app_admin interface

commit 645cb4632eaa075be836e67f4b09e57f5394b68a
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Apr 29 15:31:02 2013 +0200

    More consistent app_admin interface

commit 6ed860b28ed40120bbfba49d694144fad0cc4fc0
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Apr 29 15:03:11 2013 +0200

    Added stats and linking to new app_admin interface