Cleaning up some code duplication.
Adjust code style.
Fix visual regression on secondary button.

Styles are conflicting with a.secondary, so we need to be explicit here.
Remove visual grid bookmarklet.

Wasn’t worth the page weight when compared to usage.
Set up media gallery to function in pattern library.
Fix favicon and touch icon on pattern library.
Drop font size on secondary buttons.
Remove unused require variable.
Clean up unused modules.
Merge pull request #338 from DoSomething/scss-cleanup

Scss cleanup