XWIKI-8757: Support 2 roles for users for app within minutes: application creator and data creator
- Applications are now separated into data space and code space
- Data space can be deleted and the application remains
-- Data space's WebHome needs to be reinitialized by the application.
- Application can be deleted and data can be preserved
- Backwards compatibility (apps can be edited with AWM) is preserved with previous applications that were developed in a single space