Fix from RobertGnz about issue with too long messages (#275)

[francwalter]

deleteMessage Funktion
README.md angepasst

[witnessmenow]

At some point I will take a look at the solutions contained in this, but this isn't a PR that can be merged as is.

There is a lot of German in the comments and the readme is updated to reflect it is a fork

[francwalter]

You live!
That's a start :)
Thanks!
Sorry for these German comments, I mixed something up with that PR I guess.
Will try a better, clean, PR with just the bugfix, but only in earliest 3 weeks (holidays).
Also the new delete function should be at separate PR and with English comments.

Edit 2024-03-06: I have never fixed my PR as promised last year!
But as this repo is not that vivid anyway and many PRs have never been pulled, I guess it is not really neccessary 😊

[francwalter]

I just opened a new PR #348 with the fixed part and without my german comments. Hope this fits this time.