Resolve "Uploading zip file fails (OpenLayers)"

Closes #440 (closed)

added 3 commits

• 9d6aa87e...a78f1362 - 2 commits from branch master
• 150895c6 - when image link is to a submap subdirectry sstructure to the file name is…

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unmarked as a Work In Progress

enabled an automatic merge when the pipeline for 150895c6 succeeds

mentioned in commit 81aa3dd8

merged