Swik 2438 missing thumbnails in import preview #1137
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This is by no means critical or urgent...
There are sometimes problems with getting thumbnails right after import has been completed (I guess it takes time to create thumbnails on the file service). This PR tries to solve this by retrieving thumbnail files from the file service, repeatedly, 10 times, and using base64 to show these images in a modal dialog.
One way to test it and see whether it's an improvement is by showing both base64 and url (current approach) based images (uncommenting lines 117 and 122 in ImportPreviewModal.js).
There are also some improvements for the import progress bar.