fix(styles): fix horizontal align for comm pref (#4098) r=vladikoff
fix(styles): fix horizontal align for comm pref (#4098) r=vladikoff

Fixes #3886
mozilla/fxa-content-server,mozilla/fxa-content-server,shane-tomlinson/fxa-content-server,mozilla/fxa-content-server,shane-tomlinson/fxa-content-server,shane-tomlinson/fxa-content-server