Describe the bug
As a user or admin I can leave empty the title field and description field of my initiative when editing it from the admin side.

It qualifies as a bug as when creating the initiative in the initiative wizard it is not possible to leave these fields empty.

To Reproduce
Steps to reproduce the behavior:

• Create an initiative
• Go edit on the admin side by deleting what's in the title and description fields
• Update
• See that the initiative is now empty and the form was OK validating this.

Expected behavior
There should be something checking that these fields are not empty when trying to update the initiative and displaying an error if so (not possible to save error banner + field highlighted in red)

Extra data (please complete the following information):

• Decidim Version: lastest version of develop branch