### 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
original_transform = Transform2D();
	bool transform_stored = false;
	for (CanvasItem *ci : p_canvas_items) {
		CanvasItemEditorSelectedItem *se = editor_selection->get_node_editor_data<CanvasItemEditorSelectedItem>(ci);
		if (se) {
			if (!transform_stored) {
				original_transform = ci->get_global_transform();
				transform_stored = true;
			}
			se->undo_state = ci->_edit_get_state();
			se->pre_drag_xform = ci->get_global_transform_with_canvas();
			if (ci->_edit_use_rect()) {
				se->pre_drag_rect = ci->_edit_get_rect();
			} else {
				se->pre_drag_rect = Rect2();
			}
		}
	}
}
void CanvasItemEditor::_restore_canvas_item_state(List<CanvasItem *> p_canvas_items, bool restore_bones) {