Add control panel

[dann-merlin]

Add a more featureful control panel than the simple control panel at the bottom. This should work kind of like the spotify mobile app. The control panel should appear when pressing on the simple controls panel on the bottom of the screen. It should then slide up and fill the whole screen. Via a button press or a slide downwards, it should disappear again.

The control panel should feature:

• a large cover image
• Track title and Artist
• A progressbar (draggable)
• pause/play button
• previous/skip buttons
• shuffle toggle
• repeat toggle
• back button
• like/unlike button
• timestamps
• devices button/popover (any way to select the speaker)

It would also be nice, if one could swipe the cover art right/left to skip to the next/previous track.