I am getting a "TypeError: Cannot read properties of undefined (reading 'value')." when changing values in "settings".

- [x] I am on the [latest](https://github.com/ActivityWatch/activitywatch/releases/latest) ActivityWatch version.
- [x] I have searched the issues of this repo and believe that this is not a duplicate.

- **Windows 10 Version 21H1 (OS Build 19044.1889)**:
- **ActivityWatch v0.12.0**:

## Describe the bug

I am getting this error "TypeError: Cannot read properties of undefined (reading 'value'). See dev console (F12) and/or server logs for more info." when changing **Start of day** from the default value which is "4 AM" to "12 AM".


## To Reproduce
Steps to reproduce the behavior, for example:
1. Go to 'Settings'
2. Click on the little clock icon and change the value form "4 AM" to "12 AM"
3. See error

## Expected behavior

I expect the value to change with no errors.