### 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 (!ci || !ci->is_visible_in_tree()) {
					continue;
				}
				if (ci->get_viewport() != EditorNode::get_singleton()->get_scene_root()) {
					continue;
				}
				if (Object::cast_to<Node2D>(ci)) {
					Node2D *n2d = Object::cast_to<Node2D>(ci);
					if (key_pos) {
						n2d->set_position(Vector2());
					}
					if (key_rot) {
						n2d->set_rotation(0);
					}
					if (key_scale) {
						n2d->set_scale(Vector2(1, 1));
					}
				} else if (Object::cast_to<Control>(ci)) {
					Control *ctrl = Object::cast_to<Control>(ci);
					if (key_pos) {
						ctrl->set_position(Point2());
					}
				}
			}
		} break;
		case CLEAR_GUIDES: {
			Node *const root = EditorNode::get_singleton()->get_edited_scene();
			if (root && (root->has_meta("_edit_horizontal_guides_") || root->has_meta("_edit_vertical_guides_"))) {
				undo_redo->create_action(TTR("Clear Guides"));
				if (root->has_meta("_edit_horizontal_guides_")) {