5907: Hide deprecated trackers from trackers counts.
Tracker blocked, but user don't know which one it is
The "Mapbox" tracker from AdvancedPrivacy, isn't a tracker anymore according to the last tracker's list.
This lead to an incohrence: the application list shows "1 tracker blocked out of 1", but clicking on the app, it doesn't show anything.
This MR fix this case, hidding the deprecated tracker. Now the list will show "0 tracker blocked out of 0" with the same data.