Present benchmark result details

The core benchmark dashboard at https://testresults.qt.io/grafana does not present details well. The Y-values differ across data sets and low Y-values are compressed against the X-axis. Some contain many overlapping data sets that are hard to read.
http://testresults.qt.io/grafana/d/S6JmO-yVk/core-benchmarks?orgId=1&from=now-30d&to=now&timezone=utc&var-host=badlands&var-branch=dev&var-component=$__all&var-test_file=$__all&var-test_function=$__all&var-data_tag=$__all