Give prompt during reconfigure (#12575)

[Jürgen Spitzmüller]

Am Dienstag, dem 16.05.2023 um 15:12 +0200 schrieb Pavel Sanda:
> That said, racoon has a point  - there is a real issue, that our
> status line is not properly updated with reconfigure running so for
> newbie the dialog is better than visually frozen UI.

The dialog still should be hideable. Everyone who git that information
once will probably know it for the rest of their LyX usage.

-- 
Jürgen