FLUID-4953: Background colour now applies properly when switching contrast themes.
Merge remote-tracking branch 'jon/FLUID-4938' into demo

* jon/FLUID-4938:
  FLUID-4938: Removed some redundant styling. In Webkit, a vertical scroll is appearing but can't figure out why.
  FLUID-4938: Height of the panel was slightly off. Increased the height to fix vertical scroll from appearing.
  FLUID-4938: Description text for toggle switches and emphasize links now wrap properly. The height of the panel was adjusted as a result. Also tweaked the toggle switch positioning.
  FLUID-4938: Changed fat panel font to use OpenSans. I had to tweak the alignment of the text on colour and contrast, and the toggle buttons because of the font change.
  FLUID-4938: Reverted the UIO panel to be a single horizontally scrolling panel. Changed the reset and show/hide tabs to match the design more closely. These tabs still need appropriate rounding of corners and icon treatments.
Merge remote-tracking branch 'jon/FLUID-4953' into demo

* jon/FLUID-4953:
  FLUID-4953: Background colour now applies properly when switching contrast themes.