move audio popular to a horizontal container
no secondary column for audio pages
add audio classes to trails
refactor layout of facia css
quotemark again
fixing icons
refactor of icons
more tightening of icons
sass lint fix
copy patrick's 'most viewed galleries' for audio
include gallery icons; update onward agent
sass lint fix
don't limit audio player yet
sass lint fix
white icons when on dark backgrounds
correct icons on media pages
Merge pull request #5901 from guardian/audio-control-update

'Popular in Audio' container