bug#31861: 26.1; [feature request] Add option to bulk-copy directories to dired

[Christoph Michelbach]

I noticed that you added an option to bulk-delete directories via dired: One can
now select several directories and instead of answering "yes" when asked whether
it should be deleted regarding every single one individually, answer "all" and
be done.

However, copying several directories is still as painful as deleting used to be.
Can you please add the same option to the copying operation?

PS: If there is a better way to ask for an improvement / a feature than writing
to the bug reports mailing list, please let me know.