Compact UI submit button is slow and does not disable itself on click, making it possible to create duplicate media

This is even more problematic when DAT is enabled. @berdir could you expand on the async/setTimeout idea or any others you might have?

primsi → changed the visibility of the branch 4.x to hidden.

Discussed with @berdir to try with hiding the compact view entirely and replace it with `Uploading assets...`

The first file attached, showing the status, didn't seem to work. Trying with a link to google drive.

https://drive.google.com/file/d/1qu32wkGvGjEZII71vRsP7K5zekIrRgaD/view?u...

Additional note: I use throttling so it's more obvious. That's why it's so slow.

@primsi, I've tested you changes and this works for me. Do we know if we can get a stable release for this module with this included?

Thanks for testing and confirming. Merged, a release will follow soon.