Funding Request: Improve Editing UX for Neos 9.1

I worked 26h in October and 66h in November on this project.

With that my part of this budget is finished and 58h carry over to Funding Request: Improve Editing UX for Neos 9.1 - finishing up - #3 by sebobo

We worked intensively on polishing, solving edge cases, getting more feedback and improving the UX even further.

The link editor is already merged, but still gets smaller improvements while we test.