Create upload status

[talolard]

Data "upload" happens in a recusive promise chain, but the user can start interacting with the data before it completes, which is important on large files.
We need to give them an indication the can do that, as well as something that tracks the progress of a file upload.

Probably the best way would be some progress bar at the bottom of the page that is infomred by the promise itself about the rate of progress.

[talolard]

This has another caveat that if the user leaves in the middle of upload, the data is an invalid state because some uploaded and some didn't.

[talolard]

Also, the insert trnsaction blocks so we can't read anyway. Maybe add some timeouts so that their is access to the db ?>