### Godot version

v4.0.beta.custom_build [eaf306e0b]

### System information

Windows 10

### Issue description

Selecting a `Window` node in the Editor's SceneTree results in the message
```
editor/editor_data.cpp:1058 - Parameter "p_node" is null.
```
and the Inspector shows empty content instead of the Window's properties.

I would expect, that clicking on a node in the SceneTree lets me edit the properties of the node.

Bisecting shows that this behavior got introduced in #71770

### Steps to reproduce

1. Create a Window node
2. Click on the Window node in the Editor's SceneTree

### Minimal reproduction project

N/A
};
				drag_from = click;
				drag_type = DRAG_BOX_SELECTION;
				box_selecting_to = drag_from;
				return true;
			} else {
				bool still_selected = _select_click_on_item(ci, click, b->is_shift_pressed());
				
				if (still_selected) {
					
					drag_start_origin = click;
					drag_type = DRAG_QUEUED;
				}
				
				return true;
			}
		}
	}
	if (drag_type == DRAG_QUEUED) {
		if (b.is_valid() && !b->is_pressed()) {
			_reset_drag();
			return true;
		}
		if (m.is_valid()) {
			Point2 click = transform.affine_inverse().xform(m->get_position());
			bool movement_threshold_passed = drag_start_origin.distance_to(click) > (8 * MAX(1, EDSCALE)) / zoom;
			if (m.is_valid() && movement_threshold_passed) {
				List<CanvasItem *> selection2 = _get_edited_canvas_items();
				drag_selection.clear();
				for (int i = 0; i < selection2.size(); i++) {