Is your feature request related to a problem? Please describe.
Users can currently only edit the first snapshot rule in the UI Config. Any additional rules have to be added/edited in the config.json file directly.

Describe the solution you'd like
It would be a better experience if users could add/edit/remove all snapshot rules from the UI Config.

Note that we'd need to require at least 1 snapshot rule - so if there's only 1 rule left, then the user should not be able to remove it.

Note that users cannot currently edit individual day settings from the UI Config ("only on Day 28"). This does not need to be changed as part of this Issue.

Describe alternatives you've considered
The alternative is just that users will have to edit the config.json file directly, which will be the only option for users unless this feature is worked.

Additional context
None.