1. Currently, when authentication is enabled, Guest user is prestend with two
buttons in Build View: "Keep this build forever" and "Delete this build".

Obviously, Guest cannot do those actions and clicking on the buttons leads to
uninteresting and confusing to users standard page:
HTTP Status 403 - Access to the specified resource () has been forbidden.

Ideally, the buttons should not be present for Guests.

2. The Build View also contains build duration info and when the build was started.

But for the currently running build the info presented to users is confusing:

Started 32 minutes ago
Took 0 seconds <-- doesn't make sense

It would be better to replace it by: In progress for 32 minutes or something
like that.

Feel free to assign this to me if you think the enchancements make sense.