Choose the timeframe for test case metrics

The summary metrics on a test case page now respond to a date range picker, with presets for the last 24 hours, 7 days, 30 days and 12 months, plus a custom range. The selection lives in the URL, so a link to a test case carries the window you were looking at.

Narrowing the window surfaces a test that has passed for months and started failing this week, which a longer average is slow to reflect.