[TYPO3-team-core-v5] Please Test Ember 1.0 Upgrade

[Sebastian Kurfürst]

Hey everybody,

I finally found the time to continue with the Ember 1.0 Upgrade. You can
find the changeset at:

https://review.typo3.org/#/c/19886/

It still has one known bug (Image Handling / Cropping broken); but
everything else should work I think.

You would help me very much if you could already test this change, see
if functionality which was working before is broken afterwards. I
already tested the change quite a lot, but as it touches almost every
area of the content module, it is very easy to forget things...

Thanks and greets, Sebastian