Change flow in CKEditor modal dialog, separate submit buttons.

First version was created and all plugins were updated.

It looks like this:

However, this might be a breaking change, because all existing plugins would have to be updated.

The MR is in draft: it would be good to remove that if you have finished with it, regardless of the maintainers decision about whether it can be merged yet.

Applies cleanly, works well for meL: I *much* prefer this flow which makes a lot more sense than the current one.

Thank you Dale :-)
Draft removed.

Then we'll say RTBC :)