Overlays: Cleaned up the appearance of the panels and bars
Merge pull request #3752 from pjackson28/overlaywork

Overlays: Cleaned up the appearance of the panels and bars
Harmonized Overlays, Lightbox, Share, Session Timeout and Modal
Merge pull request #3753 from pjackson28/overlaywork2

Harmonized Overlays, Lightbox, Share, Session Timeout and Modal
Tables: increased contrast of disabled arrow icons
Merge pull request #3755 from patheard/table-sort-contrast

Tables: increased contrast of disabled arrow icons