Improve settings ba1 to implement 1

[pinterid]

Checklist:

• Have you added an explanation of what your changes do and why you'd like them to be included?
• Have you updated or added documentation for the change?
• Have you tested your changes with successful results?

Type of Changes:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation (non-breaking change which adds documentation)
• Breaking change (fix or feature that would cause existing functionality to change)

What is the current behavior? (link to any open issues here)

• Currently it is not possible to save changes user settings, if the E-Mail field is empty. Settings Save Bug #108

What is the new behavior (if this is a feature change)?

• Now the E-Mail field is declared as required and the changes cannot be saved if its content is empty. Settings Save Bug #108

Other information:

• Ref: 🐍

[schettn]

Have you checked if there are other empty fields causing
the save problem too?

[pinterid]

Have you checked if there are other empty fields causing
the save problem too?

@schettn the mail field is the only required field (defined in the engine), although there was another bug on a user profile that if only the first name was entered and no last name, the name on a user profile was not displayed. But this issue was fixed in #122.

[kleberbaum]

Should be ok to merge.

[Aichnerc]

LGTM

[schettn]

lgtm