Do not render text in tooltip of Last Message Correction
Bug description
Gajim renders, with HTML, last message correction.
Steps to reproduce
Send message <i>one</i> <b>two</b> <tt>three</tt>. Correct it (Utilise XEP-0308). Hover cursor on message was corrected icon.
Software versions
OS version: Salix OS 14.0.1 (Slackware 14.0 based) GTK version: 2.24.10 PyGTK version: 2.24.0