Option/Alt-click to expand/collapse all child directories

[membranophonist]

🌈 Feature

As in the macOS Finder, allow the user to hold Option/Alt and click on a directory to expand or collapse it and all of its child directories.

1. User holds down Option/Alt key
2. User clicks on a directory
3. The directory and all of its child directories either expand (if the clicked directory is closed) or collapse (if open).

Check out the macOS Finder's behavior when clicking on a directory's disclosure arrow with Option depressed in List view.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[github-actions]

This issue has been automatically closed because there wasn't any activity after the previous notice or the stale label wasn't removed.