Post Settings: No 'Author' selection for 'author'
Post Settings: No 'Author' selection for 'author'

closes #3756
- The post settings menu’s option to change the post’s author isn’t
displayed if the user has the ‘author’ role.
- Also fixed some incorrect indentation in the template (no actual code
change)

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