Complete validation in Add profile and Edit profile

Front end validation should prevent database errors due to constraints on the profile table (not null, unique, ...)
Currently only first name, last name and phone number are validated at front end. This produces unexpected errors for the final user.

**Handle not null**
- look for all the inputs which correspond to database columns which must not be null or empty string and don't have a default value and mark them with a * in the label (i.e. Last name *) to help the final user understand which inputs are mandatory
- before calling the create/edit api verify that the values are not null or empty string, in that case show an error message