Feature request: Add 7 days and 30 day options to 'Last' drop-down menu

[jcwren]

The current selection of period options (1 hour, 6 hours, etc) are adequate for short flights, but with some balloons staying up a month or more (or in the case of HIRFW-6, launched on 2016-09-20 10:04:55, almost a year!), the choice between 3 days and 'All' is somewhat limiting.

It would be really nice to have a 7 day and 30 day track available for the long duration flights.