### 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 (modified_canvas_items.is_empty()) {
		return;
	}
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(action_name);
	for (CanvasItem *ci : modified_canvas_items) {
		CanvasItemEditorSelectedItem *se = editor_selection->get_node_editor_data<CanvasItemEditorSelectedItem>(ci);
		if (se) {
			undo_redo->add_do_method(ci, "_edit_set_state", ci->_edit_get_state());
			undo_redo->add_undo_method(ci, "_edit_set_state", se->undo_state);
			if (commit_bones) {
				for (const Dictionary &F : se->pre_drag_bones_undo_state) {
					ci = Object::cast_to<CanvasItem>(ci->get_parent());
					undo_redo->add_do_method(ci, "_edit_set_state", ci->_edit_get_state());
					undo_redo->add_undo_method(ci, "_edit_set_state", F);
				}
			}
		}
	}
	undo_redo->add_do_method(viewport, "queue_redraw");
	undo_redo->add_undo_method(viewport, "queue_redraw");
	undo_redo->commit_action();
}
void CanvasItemEditor::_snap_changed() {
	static_cast<SnapDialog *>(snap_dialog)->get_fields(grid_offset, grid_step, primary_grid_steps, snap_rotation_offset, snap_rotation_step, snap_scale_step);
	grid_step_multiplier = 0;
	viewport->queue_redraw();
}
void CanvasItemEditor::_selection_result_pressed(int p_result) {