[#739] Fix navlinks not being underlined in celerity

Only target the links in the menu dropdown (for mobile view) when
removing the underlines

Fixes #739
Fix the account link/login link position in mobile

Was fine in Tropo, needed tweaking for other skins
Tweak modal colors
Remove visual bullet points from account links modal
whitespace cleanup
[#739] Add underline to gradation vertical sidebar links

Fixes #739
Remove extra padding for subnav

* reduces the width taken by items in the sidebar (there's an existing
  indent)

* fixes the wrapping being weird
Tweak spacing around the "approve or reject" legend/header
Tweak link colors
Merge pull request #750 from afuna/tweak-foundation-from-feedback-round-3

more visual tweaks