Issue: Thread headers

Ok, I think this would be excellent addition to VaultWiki and also something relatively easy done, as you already have headers that work as forum headers.

Thread headers are the same thing, but instead in forums, they work in threads in same manner. Every thread could have own thread header and thread headers would have its own namespace. We can allow different usergroups to create and/or edit thread headers.

Use of thread headers could be different, we can use it as first post visible on every thread page (something similar to vborg) by copying contents of first post in thread header. We could put there important information considering this thread and thus enabling users to find them on every page of thread, which is in my opinion very useful for many types of threads.

Anyway, this is something that would be very useful for any forum and yes, I would really love to have feature like this. Please, can you make it?