## Summary

- Select the first Git panel entry from the visible row indices instead
of treating an entry index as a visible-row position
- Avoid selecting files hidden by collapsed sections in both tree and
flat views
- Add a regression test for collapsing the only populated section in
tree view with no active selection

Fixes ZED-AZ3
Fixes ZED-B0Z

Release Notes:

- Fixed a crash in the Git panel when collapsed sections were used in
tree view.