Easier comparing last 2 days and to best day

New to pvoutput and liking it! Found myself comparing several dates to get a feeling for the performance.

My idea, if you click compare and have nothing selected it will always pick the two most recent days.
Second, if you have only one date selected it will compare to the best output ever/this year.

For best output dates enter #r in the compare input

Last 1 days enter 1 day, 2 day etc