[BitBucket user: Alain Mazy]
[BitBucket date: 2019-01-24.09:23:48]

I've captured the bug while doing something else (will look later):
![Capture.PNG](1918679651-Capture.PNG)

So, this means that the `fileuploaddrop` event is fired twice with the same content (1 file in this case)

And it seems that the event is triggered twice at very high level (from jquery) because I passed 2 times in this code:
![Capture.PNG](2741110632-Capture.PNG)

So I've added a log to detect if the event is being registered twice: https://hg.orthanc-server.com/orthanc/changeset/4cfed5c2eacd850db5654f46dbb0f8192d07c781