Logofrag - Thread ACLs

I did commit to dropping the thread properties editing functionality.  It was being strange and difficult to work on, so it simply will not be a thing.  Instead, I moved ACL control to its own page, which will be accessible from a moderator control panel in the thread.  I did a little bit of checking around the database and determined that it's best to simply try to occupy permission ID #1 first and if it's taken, use the maximum plus one.  Eventually, the table will waste lots of IDs, but I'm thinking of implementing a "pack database" button for administrators.  The thread ACL control works very nicely.  Tick the boxes next to an ACL entry to remove it and type a name in the text box under the list to add it.