Rename mixin column-height to row-height
Document the grid system
Add right-hand-most-popular component
Add list item type for right-hand-most-popular
Add styling for right hand most popular list items
Add styling for right hand most popular list items
Pass a property in to the function, not a string

Leads to clearer code.

I also added some better wording for the unit tests after comments from @kenlim.
Fix styling for RHS mos tpopular list variant
article bootstrap takes discussion switch into account
Small bug in errors on component
Fix more styling issues with RHS most popular
Fix more styling issues with RHS most popular
Rename mixin column-height to row-height
Document the grid system
Fix comment in grid bookmarklet
Remove font scale and grid system documentations
Merge branch 'rename-column-height-in-row-height' of github.com:guardian/frontend into rename-column-height-in-row-height
Re-remove the grid system pdf
We do not know if there is a video at the top of the body.

This is because in this context we do not have the body.

So take the image form the 2st video instead.
Recommends on comments now log if you are logged in and error on double recommend