Found a bug? Please fill out the sections below. 👍

Issue Summary

User can update already created events, but we can click 'save' button even if user hasn't updated any of fields.

Steps to Reproduce

1. Create event if don't have any.
2. Navigate to the event
3. You will be able to save and it will really make a fetch request even if you haven't updated any field

Any other relevant information. For example, why do you consider this a bug and what did you expect to happen instead?

Actual Results

Right now, save button is working even if any field is not updated yet.

Expected Results

Save button should be disabled if none of fields is updated yet.

Evidence

_CAL-2924