Multitude of fixes to central server pages and styling.
make sure default_language changes based on session
Solved problem for wrong node cache. Now, truly fixed!
Merge pull request #1143 from jamalex/landing_page_fixes

Multitude of fixes to central server pages and styling.
fixing bugs and code readability
Merge pull request #1151 from bcipolli/topic_tweaks

left-over code tweaks from cross-merge
Merge branch 'release-0.11.1' of github.com:learningequality/ka-lite into dubbed_video_choice