FavoriteSectionHeader: Increase the favorite header height on iOS
This merge request brings a fix to:
- The favorite sections header height's value is increased in order to fix its layout on iOS.
- The favorite servers titles on tvOS that do not have a proper color to match the layout of the several collection views in the application. This also allows to adjust the color automatically according to the system theme.
- The favorites sections headers' text colors are adjusted on both iOS and tvOS.
This merge request also brings a cosmetics addition with:
- The addition of proper headers to the favorite files.
Closes #1806 (closed)