Fixed issue with slider thumb being incorrectly offset when repositioned on screen post-render (due to caching of left bounds).
Fixed issue with slider thumb being incorrectly offset when repositioned on screen post-render (due to caching of left bounds).

Enyo-DCO-1.1-Signed-off-by: Chris Patalano <christopher.patalano@lge.com>

mcanthony/moonstone,mcanthony/moonstone,enyojs/moonstone,mcanthony/moonstone