Fix regressions in 3.4.8

This ensures that playback in shuffle mode starts with the selected item (if there is one), it makes sure that playback is not continued for items if a repeat-mode is set, it clears the descriptive title used by the mini player (so if you first play an audio item, its name is not continued to be displayed if you play a video afterwards) and we use the same collection playback behavior for CarPlay now like within the app (so the shuffle mode is respected when set and we don't always start with index 0).