A subflow containing a ui-template, and packaged as a module, does not appear in dashboard config panel

### Current Behavior

If a subflow containing a ui-template is packaged as a module and installed then the node does function correctly, but the widget does not appear in the dashboard panel.

### Expected Behavior

It should appear in the panel.

### Steps To Reproduce

Install this node directly from github using
`npm install colinl/node-red-dropdown-cdl`
Restart node-red and instantiate the node Dropdown CDL, which appears in the Function section.
Open the node and select a Group. Note - select the correct group as due to [another problem](https://discourse.nodered.org/t/node-red-4-0-0-beta-1-released/86433/18) it is not possible to get back into the config again.
Deploy. The dropdown appears in the dashboard but not in the dashboard config panel.

### Environment

- Dashboard version: 1.6.1
- Node-RED version: 4.0.0-Beta.1
- Node.js version:20
- npm version:
- Platform/OS: Ubuntu on laptop
- Browser: Edge

### Have you provided an initial effort estimate for this issue?

I am not a FlowFuse team member