Fixes #11178.  Tweak IE CSS for sliders in quirks and a11y mode.  Tundra progress bar in Slider/quirks is just very light but is not clear.
Fixes #11178.  Tweak IE CSS for sliders in quirks and a11y mode.  Tundra progress bar in Slider/quirks is just very light but is not clear.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@22207 560b804f-0ae3-0310-86f3-f6aa0a117693

Sam-Cummins/delite,kitsonk/delite,kitsonk/delite,harbalk/delite,Sam-Cummins/delite,harbalk/delite