[sldev] [Patch] Line editor history bugs

[Aimee Trescothick]

Another pair of related patches in need of review for Snowglobe:

http://jira.secondlife.com/browse/SNOW-69 (VWR-14267)
Clicking send in an IM window does not add the sent text to the line  
editor history.
Fairly trivial one line fix.

http://jira.secondlife.com/browse/SNOW-71 (VWR-14278)
Gesture auto-completion adds uncommitted suggestions to the line  
editor history.

Thanks,

Aimee.