Edit chapter title from within the editor
We should re-enable the chapter title block style in the editor.
Putting in brackets the corresponding package where the changes should be applied.
There are a couple of gotchas:
- Only one chapter title is allowed per chapter. [core]
- On save, the title data should also be kept separately on the fragment. [pubsweet]
For the time being, if editing the title from two sides becomes a problem, maybe renaming should be turned off in the bookbuilder.