Automated HAR capture for Studio

Collect page load information in HAR files for Studio via bok choy tests.

STUD-2028
I think something funky may have happened here with the rebase - I actually added the try/except because at the time, there was no code handling the `AttributeError`. Since the error is caught now, I'm not sure my edit is necessary anymore. That said, the try/except feels a little more pythonic to me. @cahrens thoughts?