This diff adds a new option ?timestamp=<unix> that allows you to jump to a specific log line within a run.
Note: there's a workaround here where we try up to 20 times to scroll to the desired position. If we scroll and find
that there is more scrolling to do, we scroll again. I spent a few hours trying to figure out why react-virtualized
gives the wrong Y position for the target row on the first pass, and in my tests (with a fairly small number of logs),
it only ever required two passes. I set the threshold to 20 because it seems like react-virtualized "gives up" measuring
rows after a while and just starts using the default row height. Not super happy with this solution, but because
it can be done within a single animation frame there is no visual jitter or jumping.
Right now there is no way to copy a link to a specific timestamp, would be a good next step I think!