[feature] More friendly failure management when uploading a lot of files

[OshinoShinobu-Chan]

Related problems
I'm trying to upload a huge directory with many files and subdirectories to nextcloud. And I find in the log, that some of the files failed to be uploaded, because of some exceptions. But it's really hard to figure out which files failed exactly.

Describe the solution you'd like
I hope nextcloud could add a feature that list all the failure happened when uploading (with file name, path, failure type, etc.), and add a button for retry.