Fix issue with editor and images
Fix issue with editor and images

ref #4459

- move initMarkers back to its original home
- add new test that a post with an image can be edited

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