Fixes issue 3327: TopicBar uses the wrong font-colour the first time it is edited if no topic is set
Fixes issue 3326: TopicBar shouldn't reset the topic if someone else changes it whilst it is being edited.
Change-Id: I5ca1535dc9edbc9eac237f83c69efc3b910c3013
Reviewed-on: http://gerrit.dmdirc.com/248
Tested-by: Gregory Holmes <greboid@dmdirc.com>
Reviewed-by: Chris Smith <chris@dmdirc.com>
Tested-by: Chris Smith <chris@dmdirc.com>