Adding an instrument should prompt for its receipt

[charlesjhill]

We don't yet have this functionality exposed anywhere in the frontend, but our backend supports linking assets to a PuchaseInfo object which records information like date, cost, vendor, invoice number, etc.

When you add an instrument to the application, and especially new instruments, we should prompt the user to optionally supply this information. One way to model this information could be using the Material Stepper component, which would also allow for splitting information up among several pages.