Allow a maximum of 50 pending mod invites.
thing: Catch KeyErrors in _by_fullname.

A key error will happen if the thing type is invalid.
Remove update notice from footer privacy policy link.
cloudsearch: Resolve things lower in the stack.

This allows us to use the safe_get function which is very helpful should there
be database corruption. *cough*whoops*cough*
cloudsearch: Removed obsolete desired_things function.
wiki: Only show infobar once.
random special subreddits: retain querystring in redirect
modlog: Allow filtering by multiple moderators via url.
subreddits/mine: Show moderation permissions in json.
messages: Fix dest username leak on deleted users.
moderation: Add missing modaction text for description field.