solved thread prefix banner

Adding prefix to thread on marking post as solution (or removing on unmark) Supports Xon's Multi Prefix and with it also allows to remove certain thread prefixes after marking post as solution

Purpose This plugin has three related functions, each optional of course: A link to mark threads as solved/unsolved, which adds/removes a prefix, and optionally moves the thread. Optionally a banner on solved threads, telling the user more visibly that the thread is already solved. Optionally...