[bug] Missing nametag faction color

[monk-afk]

Previous to the last update, Filterplus mod handled only chat tags, while factions would update the HUD nametag. It worked fine, but filterplus was requesting the player's Rank, Exp, and Faction, with every message that was sent in chat. This is not efficient, and could be improved.

It's may take some time, but i think the way forward with this is:

• in FilterPlus, have a table of registered callback functions to request tags during player_join events from the mods.
• These tags are then saved in the session table which already exists
• F+ must also be able to update tags when the information changes, for example a faction name change, or level up.
• i think that's it?

If figuring this out takes more time than I'm comfortable leaving this issue open, i'll set the nametags to how they were before the update, but this may cause the same high cpu time from F+ we had before