+ Fixed over-sized context album cover with device pixel ratio higher than 1.0 (#1166).
+ Fixed playing widget fading from a blurry previous cover with device pixel ratio higher than 1.0.
+ Made playlist source icon, album cover manager and OSD pretty cover respect device pixel ratio.
OBS-URL: https://build.opensuse.org/package/show/multimedia:apps/strawberry?expand=0&rev=138
