Change text on leave modal cancel button
Change text on leave modal cancel button

issue #3106

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