Icon wrapper around signing inputs
Icon wrapper around signing inputs

No issue

References https://github.com/TryGhost/Ghost-UI/commit/379a630e1bc1

- Adds `<span class="input-icon icon-mail">` around signing inputs to help match markup used elsewhere

acburdine/Ghost-Admin,kevinansfield/Ghost-Admin,acburdine/Ghost-Admin,kevinansfield/Ghost-Admin,TryGhost/Ghost-Admin,JohnONolan/Ghost-Admin,airycanon/Ghost-Admin,airycanon/Ghost-Admin,TryGhost/Ghost-Admin,JohnONolan/Ghost-Admin,dbalders/Ghost-Admin,dbalders/Ghost-Admin