garrynewman/GWEN — pull request #82 by epajarre (2013-09-07 17:27:28+00:00)
Title: Repostion Slider Bar when Slider size changes

Reposition Slider Bar when Slider size changes by adding
Slider:OnBoundsChanged(). Had to add empty body for
UpdateBarFromValue, because it may be called from constructor.
(Should fix that, but Gwen seems to end up calling virtual
functions from constructors also otherwise.)