### 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
}
	if (k.is_valid() && !k->is_pressed() && drag_type == DRAG_KEY_MOVE && (tool == TOOL_SELECT || tool == TOOL_MOVE) &&
			(k->get_keycode() == Key::UP || k->get_keycode() == Key::DOWN || k->get_keycode() == Key::LEFT || k->get_keycode() == Key::RIGHT)) {
		
		if ((!Input::get_singleton()->is_key_pressed(Key::UP)) &&
				(!Input::get_singleton()->is_key_pressed(Key::DOWN)) &&
				(!Input::get_singleton()->is_key_pressed(Key::LEFT)) &&
				(!Input::get_singleton()->is_key_pressed(Key::RIGHT))) {
			if (drag_selection.size() > 1) {
				_commit_canvas_item_state(
						drag_selection,
						vformat(TTR("Move %d CanvasItems"), drag_selection.size()),
						true);
			} else if (drag_selection.size() == 1) {
				_commit_canvas_item_state(
						drag_selection,
						vformat(TTR("Move CanvasItem \"%s\" to (%d, %d)"),
								drag_selection[0]->get_name(),
								drag_selection[0]->_edit_get_position().x,
								drag_selection[0]->_edit_get_position().y),
						true);
			}
			_reset_drag();
		}
		viewport->queue_redraw();
		return true;
	}
	return (k.is_valid() && (k->get_keycode() == Key::UP || k->get_keycode() == Key::DOWN || k->get_keycode() == Key::LEFT || k->get_keycode() == Key::RIGHT)); 
}
bool CanvasItemEditor::_gui_input_select(const Ref<InputEvent> &p_event) {