Chat control buttons are disabled against MUC occupants, when should not
Bug description
XHTML buttons such as Formatting and Image are disabled when they should not. Maybe this is also applied to Whiteboard and others (to be checked).
Steps to reproduce
Join a group chat. Start a private conversation. (maybe unnecessary) Change nickname.
Software versions
OS version: Salix OS 14.0.1 (Slackware 14.0 based) GTK version: 2.24.10 PyGTK version: 2.24.0
* Thank you to mmlosh for indicating on the existence of this bug.