Enhance failed uploads#6161

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tobiasKaminsky wants to merge 4 commits intomasterfrom

Commits on May 27, 2020

- first check constraints, then get failed uploads based on this constraints only
tobiasKaminsky
committed

Commits on May 29, 2020

Commits on Jun 2, 2020

Create thumbnail only if it does not yet exist
tobiasKaminsky
committed