Add new footer design.

Only show footer for transaction dashboards.
Add styles for new footer design.

Amend related_pages styles so they work in both the header and footer.
Update Stagecraft stubs for new footer design
Update cucumber tests.

Remove explicit classes from sections in the footer, since we don't
need them.

Add generic cucumber test for footer sections.

Update cucumber tests for .related-pages to deal with the fact that
this now exists in both the header and the footer.
Remove tabular numbers from small-screen header

I missed this in c47a983a212f69ff5c41949922c841e6044e8264.