Show total number of filters on blocklist page, and on custom filtering rules page

[t3dium]

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to request a feature or enhancement and not ask a question

Description

would be a useful metric to have

[talonric332]

I would want this too but with the total amount of domains blocked by filters. Kind of like how pi-hole does it.