:before doesn't work on "replaced" elements in FF

Fixes #2662
:before doesn't work on "replaced" elements in FF

Fixes #2662
Filter ssh-key deletes by hostname.

Fixes #1424
Merge pull request #3399 from circleci/firefox-checkbox

:before doesn't work on "replaced" elements in FF
Merge pull request #3399 from circleci/firefox-checkbox

:before doesn't work on "replaced" elements in FF
Merge pull request #3403 from circleci/del-dup-key

Filter ssh-key deletes by hostname.
Remove unused function causing build warnings.

/cc @bellkev
Merge commit '9467ba21af7871cfb8c30adcf369247017a3012a'
Merge commit 'fca3a8bfc0f4958bfe4cc5fc3e7b27fece14be63'