### 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
} break;
		case ANIM_INSERT_KEY:
		case ANIM_INSERT_KEY_EXISTING: {
			bool existing = p_op == ANIM_INSERT_KEY_EXISTING;
			_insert_animation_keys(true, true, true, existing);
		} break;
		case ANIM_INSERT_POS: {
			key_pos = key_loc_button->is_pressed();
		} break;
		case ANIM_INSERT_ROT: {
			key_rot = key_rot_button->is_pressed();
		} break;
		case ANIM_INSERT_SCALE: {
			key_scale = key_scale_button->is_pressed();
		} break;
		case ANIM_COPY_POSE: {
			pose_clipboard.clear();
			const HashMap<Node *, Object *> &selection = editor_selection->get_selection();
			for (const KeyValue<Node *, Object *> &E : selection) {
				CanvasItem *ci = Object::cast_to<CanvasItem>(E.key);
				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);
					PoseClipboard pc;
					pc.pos = n2d->get_position();