Users should be able to easily understand how big their uploads are

[travis]

What
We need some UI that lets users see how big their uploads are - right now they have to dig into the shards and manually add them up.

Why
Users have a difficult time even understanding how much data they are storing, which leads to support requests which takes time from us - if they could more easily see how big their uploads are, this burden could be reduced.

Cost
This is going to be a fairly big project - product and engineering need to collaborate to figure out how this should work, and then it needs to be implemented.