Incorrect elements are shown in backend in a workspace
When you change an element in a workspace, the backend PageLayoutView still shows the live-element instead of the workspace element.
Steps to reproduce:
1. install workspace extension and create a workspace
2. create an element in live-worksapce
3. Change title of element in draft workspace.
4. column-view still shows the live-title instead of workspace-title of the element.
This bug was introduced with ff8499cece24ee6739796427f34d0a0bf8b05d95, it works correctly with the commit before.