Add /about/edited page for moderators

This page shows the most recently edited items in the subreddit. Items
are added to this page using the same conditions as deciding whether to
show the "edited asterisk".
Fix IE bug caused by missing comma.
Add collection selector widget.
Reset to frontpage when form closed.
Use separate CPM for collection targeting.
Make collection UI available only to sponsors.
Include collection name in ajax request for inventory.
Add prefix to inventory key to distinguish subreddits and collections.
Properly display COLLECTION_NOEXIST error.
Limit list of subreddit names in collection picker.
beta: Redesign for edit_promo/new_promo pages.
Fix server-side jquery actions failing.
Use slideIn/slideOut instead of fadeIn/fadeOut.
Style updates for collection selector.
Add method to get targeting type.
Add methods to enable/disable geotargeting.
Disable geotargeting for collections.
Change labeling of collection feature to 'interests'.
Replace remaining references to 'ad_inq' with 'advertising'.
Sponsored.js cleanup.