Indicating removal of a repeat/repeat group

#### Problem description
While doing some exploratory testing in forms with repeats I noticed a thing that confused me a bit. I removed a repeat group which was in the middle but after that I wasn't sure which one I removed. I wasn't sure if I really clicked "remove" cause it felt as if nothing happened - everything stayed in the same place. I think the part that confused me is that there isn't any movement/ graying out while the group is being removed - e.g. if there are groups 1,2,3,4 and group 3 is removed, group 4 becomes group 3 (see the jam below). The only way to notice what happened are the numbers which I added in fields.
I was wondering if some indication of the removal could be added in the future.

#### Steps to reproduce the problem
1. Go to the submissions page of a form with repeat groups. (e.g. https://test.getodk.cloud/projects/629/forms/conditionalrepeatwithgeopoint/submissions)
2. Click "New Submission" (in WF).
3. Add a few repeat groups.
4. Remove a repeat group in the middle.

#### Screenshot
https://jam.dev/c/de06aecb-f324-4796-8798-ac3d374cd705

Start by reproducing the issue from the submissions page using a form with repeat groups, following the listed steps and reviewing the linked screenshot. Done means removing a repeat group gives clear visual feedback about which group was removed, rather than only changing the group numbers.

Written by the indexing model from the issue text.