Arcs without a specified track will still follow AnimateTrack events

[Mawntee]

Describe the bug An arc with only custom data for NJS/Offset can still be affect by an Animate Track event for other arcs before it, even though these arcs never had any track specified.

To Reproduce Steps to reproduce the behavior:

1. Create a bunch of arcs and give the first few a track, then leave the other ones blank (they might require some custom data?)
2. Create an 'AnimateTrack' event to offset the first few tracked arcs to the left
3. Notice that every arc is now over to the left, regardless of if it has a track.

Expected behavior Arcs without tracks on them should not be affected by an AnimateTrack event.

Additional context I'm not sure if having other custom data applied to the arcs affects it? Also, the (intended) animated arcs in the test map all had their 'uninteractable' property set to true, meanwhile every arc without a track, didn't have this property declared at all.