Selecting timeframes should be better

[cirobonano]

The option where you can select a custom timeframe for a report could be improved a bit. It could remember the last chosen date / time, so when you want to add or substract one day, you don't have to type it all over again.

It would also be convenient to have an option to select a specific month; if I want to see my results for may 2007, I'd have to click a lot of options before I get there.