+ The global connection state of a system. Possible
+ values are "offline", "idle", "ready" and "online".
+
+ If the device is in offline mode, the value "offline"
+ indicates this special global state. It can also be
+ retrieved via the OfflineMode property, but is kept
+ here for consistency and to differentiate from "idle".
+
+ However when OfflineMode property is true, the State
+ property can still be "idle", "ready" or "online"
+ since it is possible by the end user to re-enable
+ individual technologies like WiFi and Bluetooth while
+ in offline mode.
+
+ The states "idle", "ready" and "online" match to
+ states from the services. If no service is in
+ either "ready" or "online" state it will indicate
+ the "idle" state.
+
+ If at least one service is in "ready" state and no
+ service is in "online" state, then it will indicate
+ the "ready" state.
+
+ When at least one service is in "online" state,
+ this property will indicate "online" as well.