Favorites: Weird header layout

Since the introduction of the Favorites feature on tvOS, the layout of the favorites collection headers is weird looking with an odd color palette:

Favourites

changed milestone to %3.5.6

added Interface Regression labels

assigned to @diogo.simao-marques

mentioned in merge request !1251 (merged)

closed with merge request !1251 (merged)

closed with commit cbb63710