First pass on new expanded source UI
Merge branch 'master' into pinned-sources
Translate link on untranslated sources
About and Sources side panel, open with mouse move
Merge branch 'master' into side-panels
Merge branch 'pinned-sources' into new-ui

Conflicts:
	static/js/reader.js
About panel improvements
Merge branch 'side-panels' into new-ui
Merge branch 'master' into new-ui
Update sources header styles
Disable CSS transitions when there are too many sources
Expanding notes
Merge branch 'master' into pinned-sources
Style tweaks
Fix sorting hebrew-only sources last
Side panel peak outs and other refinements / bugs fixes
Only keep short version of commentary text in DOM until click
Small side panel fixes
Merge branch 'side-panels' into new-ui

Conflicts:
	static/js/reader.js
Merge branch 'pinned-sources' into new-ui