Make drowl_admin Drupal 11 compatible

The last compatibility fix needs to be done by @thomas.frobieter:

Check manually 0    The #drupal-off-canvas selector is deprecated in
                    drupal:9.5.0 and is removed from drupal:10.0.0. See
                    https://www.drupal.org/node/3305664.
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In https://www.drupal.org/node/3305664 → is written, that instead of using the old #drupal-off-canvas id, #drupal-off-canvas-wrapper should be used, but we are using both in code, so I am unsure, whether to remove the #drupal-off-canvas or merge it together with the #drupal-off-canvas-wrapper part.

Re #off-canvas we can ignore that. It won't have any bad effects, just a nice reminder from Drupal. I guess we're not even using this any more?

So I think you can merge this and @thomas.frobieter can have a short look if it's fine like this. We shouldn't block this on that crap ;)

We ARE using it, but we have both #drupal-off-canvas-wrapper and #drupal-off-canvas, with different css classes etc. set

Yeah I mean just in CSS, doesn't do any harm.

Merged. @thomas.frobieter please comment and reopen if you disagree.

Oh, "module0" sounds fancy, what's that? ;D

Yes, we can safely ignore this warning about the #off-canvas selector.

Automatically closed - issue fixed for 2 weeks with no activity.