XF 1.4 Thread prefixes


I have thread prefixes working however on my forum, in a particular area, there is a need for users to be able to come back and edit not only the text of their original message in the thread but the title and change the prefix.

At the moment it seems I can only edit the text of the thread. Is there a way to change this? Alternatively, if not, is their an addon that might allow me to do this?