### 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.
if (!is_visible()) {
		return; 
	}
	selected_group = p_new_name;
	for (TreeItem *E = groups_root->get_first_child(); E; E = E->get_next()) {
		if (E->get_text(0) == p_old_name) {
			E->set_text(0, p_new_name);
			return;
		}
	}
}
void GroupDialog::_load_groups(Node *p_current) {