Andreas: Update for Debian Bullseye

[Robert Lewis]

Hi Andreas -

After Debian's upgrade to v. 11.3, your packages for v. 2.6.1 install without 
needing any additional packages, except for lilypond of course.  
Unfortunately, objects in the Print View window do not work as intended -- 
which is the same problem I had back in October.

I've also tried in two virtual machines with fresh installs, one with  KDE 
(the one I normally use) and one with MATE, and I get the same results in 
both.

The odd thing is that when I compile the denemo-master.tar.gz file from http://
git.savannah.gnu.org/cgit/denemo.git/commit/, the Print View window works 
just fine -- in both KDE and MATE.

Does the Print View window work as intended for you?  What desktop 
manager are you using?  Do you have any suggestions for me?

Thanks.

Regards,
Robert
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