Improve blocked view of profiles (#10491)

* Revert "Fix filtering of favourited_by, reblogged_by, followers and following (#10447)"

This reverts commit 120544067f.

* Revert "Hide blocking accounts from blocked users (#10442)"

This reverts commit 62bafa20a1.

* Improve blocked view of profiles

- Change "You are blocked" to "Profile unavailable"
- Hide following/followers in API when blocked
- Disable follow button and show "Profile unavailable" on public profile as well

app/javascript/styles/mastodon/components.scss

@@ -46,7 +46,8 @@
     }
   }
 
-  &:disabled {
+  &:disabled,
+  &.disabled {
     background-color: $ui-primary-color;
     cursor: default;
   }