Opening Organ_leslie.xpf in OpulenZ factory presets shows a warning that makes it difficult to load the file

### System Information

Windows 11

### LMMS Version(s)

1.3.0-alpha.1.815+1721534

### Most Recent Working Version

_No response_

### Bug Summary

When I load Organ_leslie.xpf in OpulenZ factory presets, I get a warning that says: "The project contains 1 LADSPA plugin(s) which might not have been restored correctly! Please check the project."

It prevents me from dragging and dropping it to the rack. I still can right-click it and click "send to active instrument-track", but I still find it annoying to deal with.

### Expected Behaviour

It didn't need to give me that warning window which prevents me from dragging and dropping it

### Steps To Reproduce

Go to My presets
Go to OpulenZ folder
Click Organ_leslie.xpf

### Logs

Click to expand

### Screenshots / Minimum Reproducible Project

_No response_

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Reproduce the issue by opening My presets > OpulenZ > Organ_leslie.xpf in LMMS on Windows 11, then test both dragging it to the rack and using “send to active instrument-track.” Trace the preset-loading path that emits the LADSPA restoration warning; done means the preset can be dragged to the rack without the blocking warning while still loading correctly.

Written by the indexing model from the issue text.