Resolve "Move data things to data service and have correct interfaces"

Closes #419

changed milestone to %Sprint 2024-04

added priority::1 scope::Backend status::Doing labels

added 3 commits

• b580de97...72e2928d - 2 commits from branch dev
• d228ee2c - Merge branch 'dev' into 419-merge

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added 1 commit

• 49481af9 - Hotfix some UI improvments for slow connections

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mentioned in commit 05101a51

merged