Add option to collapse directory subtree recursively on mouse click

[AndreyZlobin]

Summary

Add a setting to collapse directory subtrees recursively when clicking on an expanded directory in the project panel.

Current Behavior

When clicking on an expanded directory in the project panel, only the directory itself collapses, but its child directories remain expanded. This means that when you expand the directory again, all previously expanded subdirectories are still open.

Desired Behavior

Add a setting that allows directories to collapse recursively (including all subdirectories) when clicked with the mouse.

Proposed Solution

Add a new setting in settings.json:

"project_panel": {
  "collapse_recursively_on_click": true
}