### 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_selection[0]->_edit_get_pivot().x,
							drag_selection[0]->_edit_get_pivot().y));
			_reset_drag();
			return true;
		}
		
		if (b.is_valid() && b->get_button_index() == MouseButton::RIGHT && b->is_pressed()) {
			_restore_canvas_item_state(drag_selection);
			_reset_drag();
			viewport->queue_redraw();
			return true;
		}
	}
	return false;
}
bool CanvasItemEditor::_gui_input_rotate(const Ref<InputEvent> &p_event) {
	Ref<InputEventMouseButton> b = p_event;
	Ref<InputEventMouseMotion> m = p_event;
	
	if (drag_type == DRAG_NONE) {
		if (b.is_valid() && b->get_button_index() == MouseButton::LEFT && b->is_pressed()) {
			if ((b->is_command_or_control_pressed() && !b->is_alt_pressed() && tool == TOOL_SELECT) || tool == TOOL_ROTATE) {
				List<CanvasItem *> selection = _get_edited_canvas_items();
				
				for (CanvasItem *E : selection) {
					if (!_is_node_movable(E, true)) {
						selection.erase(E);
					}
				}
				drag_selection = selection;