Add "Edit permisisons" as local task on role edit form

Result

while we're at it can we add a JS search box that filters the massive table down to the items that have matching text a la permissions_filter → ?

Needs test to verify the UI changes.

@andy-blum seems like a good follow up

Verified applying MR that on "admin/people/roles/manage/anonymous" there is a "Permissions" tab now.

Moving to NW for the tests mentioned.

Added the test!

I agree, this is a good improvement.

Committed 80aa96f and pushed to 11.x. Thanks!

Keeping open for potential 10.1.x backport. As a feature request this wouldn't qualify for the backport during RC but since this is a usability issue, it could have been filed as a bug too.

lauriii → closed merge request !3910

Discussed with @catch and decided to backport because this only needs to add a new local task, and as such is low risk.

Automatically closed - issue fixed for 2 weeks with no activity.