### Godot version

Godot 4 beta 10

### System information

Windows 10, mobile mode

### Issue description

You can give a node a blank name by deleting its name and press enter
![image](https://user-images.githubusercontent.com/94725241/210934227-a3b42f81-f152-470e-be6f-645321b9060e.png)


### Steps to reproduce

1. Create any node
2. Double click it, you should now be able to rename it
3. Backspace, than enter
4. You got a node with no name

### Minimal reproduction project

N/A
switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			get_tree()->connect("tree_changed", callable_mp(this, &SceneTreeEditor::_tree_changed));
			get_tree()->connect("tree_process_mode_changed", callable_mp(this, &SceneTreeEditor::_tree_process_mode_changed));
			get_tree()->connect("node_removed", callable_mp(this, &SceneTreeEditor::_node_removed));
			get_tree()->connect("node_renamed", callable_mp(this, &SceneTreeEditor::_node_renamed));
			get_tree()->connect("node_configuration_warning_changed", callable_mp(this, &SceneTreeEditor::_warning_changed));
			tree->connect("item_collapsed", callable_mp(this, &SceneTreeEditor::_cell_collapsed));
			_update_tree();
		} break;
		case NOTIFICATION_EXIT_TREE: {
			get_tree()->disconnect("tree_changed", callable_mp(this, &SceneTreeEditor::_tree_changed));
			get_tree()->disconnect("tree_process_mode_changed", callable_mp(this, &SceneTreeEditor::_tree_process_mode_changed));
			get_tree()->disconnect("node_removed", callable_mp(this, &SceneTreeEditor::_node_removed));
			get_tree()->disconnect("node_renamed", callable_mp(this, &SceneTreeEditor::_node_renamed));
			tree->disconnect("item_collapsed", callable_mp(this, &SceneTreeEditor::_cell_collapsed));
			get_tree()->disconnect("node_configuration_warning_changed", callable_mp(this, &SceneTreeEditor::_warning_changed));
		} break;
		case NOTIFICATION_THEME_CHANGED: {
			_update_tree();
		} break;
	}
}
TreeItem *SceneTreeEditor::_find(TreeItem *p_node, const NodePath &p_path) {