Metadata about custom filter lists

What does your feature entail? What is it for? How will it affect existing workflows or user experience?
Shows a bit more information about each filter list, to make it easy to manage.

What are the exact ways that you see a user using your proposed feature? Please go into as much detail as possible, and provide examples of how other browsers/apps implement this feature, if applicable. If your feature suggestion adds on to an existing feature, how would it work into it to extend its usefulness?
the custom filter lists should not just be a url, but instead have a title and optional description.

for example, the filter list: https://raw.githubusercontent.com/d3ward/toolz/master/src/d3host.adblock
has a header, wiht a title and description:

! Title: d3Host List by d3ward
...
! Description: Simple and small list with the most popular advertising, tracking, analytics and social advertising services

this should be used in the UI when managing filter lists.
Similarly, the filter list:https://raw.github.com/reek/anti-adblock-killer/master/anti-adblock-killer-filters.txt
has a header, with a title and no description:

...
! Title: AakList (Anti-Adblock Killer)