[LyX/master] Fix AboutLyX layout

[Jürgen Spitzmüller]

Am Samstag, dem 02.11.2024 um 13:40 +0000 schrieb Juergen Spitzmueller:
> commit 11cbc3c4a765f93268a662846d7082b089b3782b
> Author: Juergen Spitzmueller <spitz at lyx.org>
> Date:   Sat Nov 2 14:33:28 2024 +0100
> 
>     Fix AboutLyX layout
>     
>     * remove wrong (sub)namespaces. This are inserted by newer
> versions of
>       designer, although they are wrong
>     * add vertical spacer
>     * make horizontal spacer expand

Should also go to stable. Note that nowadays Designer's output cannot
be trusted.

-- 
Jürgen