add mark_as_not_a_reply action to Message
update ARO/ACO data for new action (mark_as_not_a_reply)
brought message_manager_client.js into synch with the latest version in FixMyBarangay (some FMB-specific things not used in the dummy client in MM, but it's helpful for dev to keep it all together)
add detach button to replies that might be wrongly (autodetected) marked as such
remove underline from reply and hide button labels
add detach popup/fancybox as the easiest way to do this with an explanatory text
add mark_as_not_a_reply function to message_manager js object, and call from client.js (needs some DRY tidying up in there)
add json handling to mark_as_not_a_reply