Haerd reset font to sans serif for print stylesheets

https://www.agileplannerapp.com/boards/105200/cards/4633
Merge pull request #459 from alphagov/reset-font-for-print-stylesheet

Hard reset font to sans serif for print stylesheets
Remove old topics link from footer.
Merge pull request #460 from alphagov/remove-topics-from-footer

Remove old topics link from footer.
Revert "Merge pull request #459 from alphagov/reset-font-for-print-stylesheet"

This reverts commit 98cf0594f215679e6f04cfeeacc3caa3d6fb0bd4, reversing
changes made to be36c53f80f861b2a9945c330d154c592ef599ef.
Merge pull request #462 from alphagov/revert-static-print-test

Revert "Merge pull request #459 from alphagov/reset-font-for-print-stylesheet"