Move files for Slider to preserve history
Move Slider.less to preserve history.
Initial commit of new Slider combining the 3 existing slider widgets (dijit,, mobile, dojox/RangeSlider).
Fix Slider background image rule for webkit.
fix ref to undefined "evt", refs #16323
(cherry picked from commit f1878c88cc3ec71155c9447bee29587886628568)
(cherry picked from commit 66dc3ed198375bfbb5e0a1922efa0f730ea26d32)