Retain playback modes on Apple TV

Right now, shuffle and repeat are retained on iOS only. There is no reason why not on tvOS. We should offer the same option like on iOS to disable it.

changed milestone to %3.4.10

added AppleTV Player labels

assigned to @fkuehne

mentioned in merge request !1100 (merged)

changed milestone to %3.5.0

mentioned in merge request !1158 (merged)

closed with commit 66ee42a5

closed with merge request !1158 (merged)