Add mobile layout
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)
Track list:
Player:
Sidebar:
Playlist queue:
Track options:
Metadata editor:
Settings:
