In party chat, players from other servers seem to have extra (empty)
text chunks with the same PlayerPayload link. The screenshot mode code
would replace all chunks with the hashed player name.
Changes the screenshot mode code to skip changing the chunk content for
PlayerPayload chunks unless the content contans the player name.
Also censors the tell target above the chat input.
Implemented the same focus requirements that vanilla chat has, so as long as the input retains focus, on focus loss it automatically restore the previous channel