Metrics dashboard timescales don't match if series ends
If a metric has stopped reporting, we seem to adjust the time scale of the chart to match whatever values we got back.
In this case NGINX Ingress metrics are no longer reporting, since I deleted it, but the chart series still appears like it has. But really, the last data point we have is for nearly 7 hours ago. This is misleading, and instead we should show a similar timescale as the rest of the charts.