[LyX/master] Give error if adding a branch that already exists

[Jürgen Spitzmüller]

Am Dienstag, dem 25.03.2025 um 08:16 +0000 schrieb José Matos:
> Some question to developers:
> 1. Or asking in another way what is the current state of 2.5?
> 2. What do we need to do to enter the freeze stage?
> 3. What are your plans for features that you

I'd like (in accordance with Riki) to finish up the crossrefs
enhancement project (at least lists and ranges). Should be done before
too long.

All other things could wait.

And I agree a soonish release would be good.

-- 
Jürgen