Display the default editor instead of the Text editor when adding a Long Text field in AWM

This has been solved. Testing in 16.9.0-SNAPSHOT. When updating the AWM class, the long text field comes with CKEditor, a WYSIWYG editor, which is the default editor. When changing to a `Text` default editor, as it could be expected, the Long Text field comes with a regular text editor.

Note that the change of editor on the fly is not implemented as of now. I'll close this ticket as `Cannot Reproduce`. If there's a need for it, we can create a new ticket centered around this idea of on the fly editor switching.