Unlimited saved state slots

[justkd]

Description

Currently, the app is hard coded to manage 24 saved state slots.

This should be adjusted to allow for unlimited slots.

The UI for the saved state menu should be changed to show a single track for saved states rather than two sides.

This will require a significant change to relevant code since most functions are currently having to determine which side the chosen slot is on.

Acceptance Criteria

Update [Required]

• Change the saved state menu UI to have an infinite, scrollable list.
  • This can be done independent of the javascript changes, since the 24 slots can be rendered in this way as well.
• Update the related javascript to manage unlimited saved states.
  • Don't forget that these saved states must also report to the export menu in order to be listed for export.

Definition of Done

• All of the required items are completed.
• Approval by 1 mentor.