Report filter additional date parameters (Last X weeks and next X weeks)

As an Aha! user I want to setup a two weekly reports which show:

1. Releases with a release date in the next two weeks (eg this week or next week)
2. Releases with a release date in the past two week (eg last week or the week before that)

(both of these are to show whole weeks only)

Right now the only way to achieve this is by using the specific date range parameter and manually editing the reports each week to make sure they have the correct data.

In the report filters there are the following options for additional date parameters:

This idea is to request two additional date parameters which would work the similarly to the existing: 'last week' and 'next week' parameters. The new options would be 'Last X Weeks' and 'Next X Weeks'