[LyX/master] Disable language package choice if the class preloads a package

[Jürgen Spitzmüller]

Am Samstag, dem 13.04.2024 um 08:07 +0000 schrieb Juergen Spitzmueller:
> commit 5477451e36cd9ff4e99aefea2627fbf63e028004
> Author: Juergen Spitzmueller <spitz at lyx.org>
> Date:   Sat Apr 13 10:07:18 2024 +0200
> 
>     Disable language package choice if the class preloads a package

Another candidate for 2.4.1.

-- 
Jürgen