Allow Admin to manually toggle if an event is checkInReady

[trillium]

Overview

• Temp workaround for Bug: Users Cannot Check In #1411

We need the ability for an Admin to manually force the events to be check in ready. This allows the team to be on top of potential errors when onboarding is happening and we need the event check in window to be open regardless of what the backend currently says.

Action Items

• Add a button to toggle if an event is Check In Ready

Limitations

This is a hacky fix, we haven't solved the underlying problem of why service workers might not be handling the checkInReady switch as we would expect, but this will lessen the pressure while we figure out a solve.

The service worker that turns off checkin still might catch this and someone will need to manually reopen it (potentially every half hour) until the event is finished.