### Tested versions

- Reproducible in: v4.2.stable.arch_linux
- Not Reproducible in: v4.1.3.stable.official [f06b6836a]

### System information

Garuda Linux (2.6.19-2)

### Issue description

A minor issue where UI Icons are not rendering on the Group Editor window, attaching a screenshot for reference:
![Screenshot_604](https://github.com/godotengine/godot/assets/22623256/c366164a-3d9a-4dcf-97a0-199b5a5a7ecc)

The icons were expected for Buttons like Add, Remove, Filter, etc.

### Steps to reproduce

Select any Node and go to the `Node` panel, click `Manage Groups` and the window will open.

### Minimal reproduction project (MRP)

Minor issue, easily reproducible following the above steps.
List<Node *> nodes;
			scene_tree->get_nodes_in_group(name, &nodes);
			bool removed_all = true;
			for (Node *E : nodes) {
				if (can_edit(E, name)) {
					undo_redo->add_do_method(E, "remove_from_group", name);
					undo_redo->add_undo_method(E, "add_to_group", name, true);
				} else {
					removed_all = false;
				}
			}
			if (removed_all) {
				undo_redo->add_do_method(this, "_delete_group_item", name);
				undo_redo->add_undo_method(this, "_add_group", name);
			}
			undo_redo->add_do_method(this, "_group_selected");
			undo_redo->add_undo_method(this, "_group_selected");
			undo_redo->add_do_method(this, "emit_signal", "group_edited");
			undo_redo->add_undo_method(this, "emit_signal", "group_edited");
			
			undo_redo->add_do_method(SceneTreeDock::get_singleton()->get_tree_editor(), "update_tree");
			undo_redo->add_undo_method(SceneTreeDock::get_singleton()->get_tree_editor(), "update_tree");
			undo_redo->commit_action();
		} break;
		case COPY_GROUP: {
			DisplayServer::get_singleton()->clipboard_set(ti->get_text(p_column));
		} break;
	}
}
void GroupDialog::_delete_group_item(const String &p_name) {