Don't use sans-serif as the admin font (should fall back to Arial).
Adjust CSS selector and colors for dark language selector.

The dropdown in the admin login was being targeted as a dark dropdown.
Fix ever-present scrollbar in admin navigation panel.
Also, CSS cleanup.
Fix admin nav margin with alert messages.
Add a README note about conventions for contributing CSS. Closes #971.
Use bigreason tinymce theme
Style fixes for filebrowser popup regressions from new admin nav.
Actually apply tinymce skin.
Make admin panel collapsible to the left with a nice animation.
Make the admin panel hidden/show state persist in between page loads.
This one uses localStorage instead of cookies.
Merge
Make the admin menu toggle panel a bit more subtle.
Add back minor improvements to side panel.