### 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::GroupInfo> gi;
	p_current->get_groups(&gi);
	for (const Node::GroupInfo &E : gi) {
		if (!E.persistent) {
			continue;
		}
		_add_group(E.name);
	}
	for (int i = 0; i < p_current->get_child_count(); i++) {
		_load_groups(p_current->get_child(i));
	}
}
void GroupDialog::_modify_group_pressed(Object *p_item, int p_column, int p_id, MouseButton p_button) {
	if (p_button != MouseButton::LEFT) {
		return;
	}
	TreeItem *ti = Object::cast_to<TreeItem>(p_item);
	if (!ti) {
		return;
	}
	switch (p_id) {
		case DELETE_GROUP: {
			String name = ti->get_text(0);
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Delete Group"));