Remove abcd sanity test
Add home link to left column
Relocate top marker inside article body
Handle window resize
Show home only when after left column breakpoint
Check for home class before running AB test
Add styling for home component
Use gs var for home label top
Use gs var for top of home component
Use link to for editionalised link
Remove whitespace
Use underline hover state
Merge pull request #3967 from guardian/ab-home-component

Ab home component