User feedback if file is still converting necessary when you try to add it to a timeline
If a file is still converting and you nevertheless try to add it to a timeline (e.g. via "Add file" --> "Upload" in Timeline Viewer) nothing happens. This feels like somehting is not working because there is no feedback.
There should be a notification: "File is still converting. Please try again after file has converted." Or something like this. Maybe the direct upload in the Timeline Viewer should be handled differenty to avoid this?