Delete old container show more JS
Rename container-fc-show-more => container-show-more
Remove unused plus icons related to old containers
Only need one white plus icon
Merge branch 'master' into remove-old-container-show-more
Ordering and filenames
Merge branch 'master' into remove-old-container-show-more
Fix failing test
Merge pull request #6895 from guardian/remove-old-container-show-more

Remove old container show more functionality. Rationalise show more '+' icons