[Enchantement] - Mandotory fields colour/warning.

Currently any mandatory fields are filled with default data. And if you do try to run SQL it will give you an error. (as it should).

But we while a mandatory field is empty (while selected) or was empty (upon un-selecting or selecting something else) they could have a red border or any feedback that the field can't be empty. Alternative but it's uglier it just adding the "*" like forms do.

No files or tests are named. Start by locating the form controls that populate mandatory fields and reproduce the SQL error after clearing one; determine where empty selected fields are validated. Done means an empty mandatory field gives visible feedback, such as a red border or required marker, before the invalid SQL is run.

Written by the indexing model from the issue text.