### 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
for (CanvasItem *ci : drag_selection) {
		CanvasItemEditorSelectedItem *se = editor_selection->get_node_editor_data<CanvasItemEditorSelectedItem>(ci);
		ci->_edit_set_state(se->undo_state);
	}
}
void CanvasItemEditor::_commit_canvas_item_state(List<CanvasItem *> p_canvas_items, String action_name, bool commit_bones) {
	List<CanvasItem *> modified_canvas_items;
	for (CanvasItem *ci : p_canvas_items) {
		Dictionary old_state = editor_selection->get_node_editor_data<CanvasItemEditorSelectedItem>(ci)->undo_state;
		Dictionary new_state = ci->_edit_get_state();
		if (old_state.hash() != new_state.hash()) {
			modified_canvas_items.push_back(ci);
		}