Reorder Clef button on login page

[jessepollak]

We should position the Clef button below the standard login form, so it's less confusing for users.

Structure:

Username
Password
Log In Button

• OR -
  Clef Log In

[lolux]

Closed via #152

[jessepollak]

This issue actually still exists for the login form with password + Clef button

[sandieann]

This is repeatedly causing me support issues on Clef hybrid sites where users don't log in very often. Users are entering their WordPress details and hitting the Clef button, then claiming that Clef won't let them log in! I'm now being asked to remove Clef from two sites because 'Clef is preventing us logging in'.

[jessepollak]

:/

This is hard - WordPress filters don't let us put the button below the other button, so we'd have to do some JS magic to switch the order, which will look glitchy and cause issues for custom login forms. Still investigating.