Allow characters for Interviewer/Supervisor full names

I am trying to do a batch upload all the interviewers and supervisors for fieldwork but it is giving me an error with the Khmer names for the users that I put in the fullname column.

This is a minor problem but it would be very helpful for the supervisors and HQ staff to see the names in Khmer when they look at the Interviewer’s and Supervisor’s profiles.

For security reasons usage of some characters in the fields such as interviewer name or phone number is disallowed.

A reputable security company has notified us that this is a vulnerability that might be exploited if it happens to be in the wrong hands, though no proof or demonstration was ever presented.

Please use English characters for the interviewer names, for the moment, while we try to sort it out.