Fixed broken loading state on transition between posts in editor (#1021)
Fixed broken loading state on transition between posts in editor (#1021)

closes https://github.com/TryGhost/Ghost/issues/9582
- clear the `post` model on the `editor` controller when swapping models to avoid the editor contents and the editor loading state being displayed simultaneously
TryGhost/Ghost-Admin,kevinansfield/Ghost-Admin,TryGhost/Ghost-Admin,kevinansfield/Ghost-Admin