Rolling window metrics should stop when we run out of events

[ryscheng-mobile]

What is it?

Currently if you look at any rolling window metric on the OSO website, it looks like the metric takes a dive in the last 30, 60, 90 days. That's because we ran out of events and we're just calculating a useless data point.

We should stop the rolling window when we are out of events so that we don't always show this dropoff

[ryscheng-mobile]

If we do a rolling window of a rolling window, this should also apply