Add a mobile specific layout (QT_QUICK_CONTROLS_MOBILE=1) so that Elisa can be used on Plasma Mobile.
Add mobile "now playing" footer panel (replacing the desktop header) (TODO: add volume controls)
Fix touch scrolling
Port playlist to mobile format
Expandable sidebar to view icon labels
Rework track list items so that a single touch would start playing a song
Rework track list items so that all of the context elements are in an overlay sheet (on desktop, they show on hover)
Move header elements to a second bar on mobile (except for search)