 Require to Add a new configuration for a nurse to use all the relevant screens of doctor dropdowns

Configuration to be sub-location wise.

Configuration Key: IsNurseincludedinDoctordropdown. 
Configuration Description: The nurse can be included in doctor dropdown in the screens like an appointment, OPD, Examination, patient register.

Values: True/False.

Value function:
When True: Nurse can be included in doctor dropdown in related screens
When False:  Nurse can't be included in doctor dropdown in related screens
