Have analytics duration default to log retention length

It seems like the analytics duration always defaults to 30 days, even if your log retention period is less than 30 days. It would be nice if the default analytics duration was the same as your log retention period if you select a shorter retention period. 

For example, if I were to set my log retention to just 7 days, have the default analytics view be 7 days also. Or if I set the log retention to 1 day, default to the 24 hour analytics view.