Add date filter to SEO and Readability scores dashboard

[ssardelli]

Add a date filter range to the the SEO and Readability scores dashboard.

It would be helpful to track progress/improvement on a go-forward basis on the SEO and Readability scores for our posts with adding a date range filter https://www.thetrucker.com/wp-admin/admin.php?page=wpseo_dashboard#/](https://www.thetrucker.com/wp-admin/admin.php?page=wpseo_dashboard#/

I'd like to track by date range (weekly) what percentage of posts are in the good (good/ok) vs. the bad (needs improvements) to determine if we are creating stronger posts from an SEO and Readability score. At the present time the numbers and scores will have to be recorded manually outside of the Yoast Dashboard since all of our posts are being scored.