text: Title: [Feature Request] do not display multiple timezones as an option if they are identical
  Body: I had a situation where the check's time zone was "Etc/UTC", and the browser's time zone was also UTC, but I had all 3 displayed:
  UTC, Etc/UTC & Browser's time zone. This was very confusing. In reality, clicking any of these did not change anything because in fact they were representing the same time zone.
  
  ![image](https://github.com/user-attachments/assets/f386473e-4709-48b8-a2a2-790fe21820fb)
  