List [of Overlay] Elements doesn't update automatically

When I add new overlay from ROI Manager, the list of overlay elements does **not** refresh to display the up to date list of elements.

# Steps to Reproduce

```
open("/path/to/image.tif");
roiManager("Open", "/path/to/roi.zip");
run("From ROI Manager");
run("List Elements");
run("From ROI Manager");
```

# Observed Result

Overlay Elements window doesn't list the new layers.


# Expected Result/Output

Overlay Elements window lists the new layers.


Start by reproducing the issue with the provided ROI Manager and List Elements commands, then trace the Overlay Elements window's update path. Done means running From ROI Manager again refreshes the existing window so it lists the newly added overlay layers.

Written by the indexing model from the issue text.