Syntax change : '#' in layout content regions

✨ Get rid of the mandatory "#" prefixes Active has added support to renderable without "#", but the old syntax is still available. It was not supposed to be a breaking change.

I don't see anything wrong in:

id: 'mypage'
label: 'My page'
render:
  - '#theme': layout__mytheme
    top_full:
      - '#type': pattern
        '#id': heading
        '#fields':
          title: 'Page title'

You have only "top_full" as #theme': layout__mytheme children?

I posted a "reduced test case" but yes, the children of '#theme': layout__mytheme are only the regions names, and they aren't special keywords.

I think maybe there is an exception to add when handling content which is a kind of special object ?

I will try to reproduce locally this afternoon

Florent, do that mean our 1.0.0 implementation was too naive?

Let's discuss before merging.

(Note: UI Patterns 2 will also need this change)

+ unit test