Fix double arrows in failures table

Also add right padding to last column in tables to avoid scrollbar
overlap.
Merge pull request #178 from alphagov/fix-55878868-failures-table

Fix double arrows in failures table
Disable tables preventing page scrolling by default

As requested by Ed.
Merge pull request #179 from alphagov/55882208-table-scrolling

Disable tables preventing page scrolling by default
Refactor vehicle licensing templates, add subnavigation back in
Update feature test
Merge branch 'master' into add-info-text-evl