styles(cropper): vertical align range input and zoom buttons
styles(cropper): use a black back drop for the crop aread
styles(avatars): use sass variables
chore(l10n): add supported locales list to our repo
Merge pull request #1564 from mozilla/issue-1492-crop-input-align

Cropper style fixes
Merge pull request #1570 from mozilla/issue-1434-locale-list

chore(l10n): move list of supported locales to our production config
fix(teats): Use execute to clear browser state
feat(signin): Add an account chooser