Toggles "Show All Music" option for iTunes Match.
Please note that you must have an iTunes Match account for this toggle to function correctly.
Make sure to enable the toggle in SBSettings!
When ON, Music.app will list all music on your iTunes Match account including music stored on your device.
When OFF, Music.app will list only the music stored on your device.
---- Please make sure to fully close (in the multitasking switcher) Music.app after using toggle! ----