Add some changes for cached_content automation.
Merge branch 'cached_content'
This should improve log pae speed a tad.
Redirect needs no exit if called with false as 2nd parameter.
Add Session::queue() to queue up database saves from FormStorage::field_save() implementations.
Add dropbutton, update logs page with FormUI, create FormUI::dupe() to display duplicate forms on the same page.
Merge branch 'master' of github.com:habari/system
Connect logs page dropbuttons to functionality.  Duplicate aggregate conrols on one page still a little wonky.