Merge latest v5 development into v6

[DL6ER]

What does this implement/fix?

Merge development -> development-v6 in preparation for a later development-v6 -> development -> master release chain of merges. Merging this PR should remove all existing merge conflicts on #1950

No functional changes. To me more precise: no changes at all except git bookkeeping

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Related issue or feature (if applicable): N/A

Pull request in docs with documentation (if applicable): N/A

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5. I have squashed any insignificant commits. (git rebase)

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• [x] The code change is tested and works locally.
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