Bug 1018707 - Empty CustomCSS

Moved the default link styles to be first in the declaration.

Moved the .ignore-external class out of customCSS and into wiki.styl. I will remove it from customCSS when this change is live.
Merge pull request #2733 from stephaniehobson/BUG-1018707-empty-customcss

Bug 1018707 - Empty CustomCSS
Fix Bug 1049964 - Buttons on Email addresses page

Made triple purpose radio buttons into single purpose button buttons.

Changed all pages in account to have a maximum width.

Fix "do you really want to remove" behaviour.