### 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
_zoom_on_position(p_zoom, viewport_scrollable->get_size() / 2.0);
}
void CanvasItemEditor::_shortcut_zoom_set(real_t p_zoom) {
	_zoom_on_position(p_zoom * MAX(1, EDSCALE), viewport->get_local_mouse_position());
}
void CanvasItemEditor::_button_toggle_smart_snap(bool p_status) {
	smart_snap_active = p_status;
	viewport->queue_redraw();
}
void CanvasItemEditor::_button_toggle_grid_snap(bool p_status) {