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Oops, I knew I had done work somewhere but forgot it was on github but not my own git server. Pulled everything together so undoing this duplicate code now.

Revert "minor edit"

This reverts commit 7048e79d.

Implemented animated GIF previews (@todo they still need to be scaled with aspect ratio and just clip rn)

Added proper file extensions based on media api content-type.
Fixed QT complaining about ending the application with a thread running.