Add image to first item in most read component
Add guss-layout mixin to global.scss
Change 'most read' wording to 'most popular'
Move most popular layout styles to own scss file
Restyle most popular component at wide breakpoint
Add new modifier to u-h css helper
Working styling for new most popular component at wide breakpoint
Indicate unavailable content
Tweak most popular component based on design tweaks
Remove image from most popular component
Tweaks to popular component
Use right col as the breakpoint for hidden popular tab
Merge pull request #2791 from guardian/tidy-up-most-read

Tidy up most read component
Removed Discussion switches (except needed ones)
Fix core nav tests
Use more explicit logic
Reinstate cleanTrailText for most popular standfirst
Merge pull request #2787 from guardian/facia-tool-404s

Facia tool: indicate deleted content
Merge pull request #2797 from guardian/discussion-switch-tidy

Removed Discussion switches (except needed ones)
303 response for alpha preference