GPII-207:
- Search and prev/next inputs now appear inverted. - Low contrast links are no longer bold.
- Blur on drop shadows are gone in contrast modes.
- Low contrast now uses RobotoSlab-regular for the content area.
GPII-207: Removed the drop shadow from the header.
Merge remote-tracking branch 'jon/GPII-207'

* jon/GPII-207:
  GPII-207: Removed the drop shadow from the header.
  GPII-207: - Search and prev/next inputs now appear inverted. - Low contrast links are no longer bold. - Blur on drop shadows are gone in contrast modes. - Low contrast now uses RobotoSlab-regular for the content area.