Add plan period filter for plan period

[jslawler]

Additional to the below statistics filters, it would be good to see a snapshot of statistics for that paid month.

Eg: Plan starts 13th of each month, then show queries for that paid month which would run from 13th, to the 13th of next month.

[Chinaski1]

I'm not sure that the implementation of recording a year's statistics is possible. But we will consult with the developers and let you know the solution for the proposed feature.