NetworkMenu/NMDeviceModem: fix status texts for airplane mode

Show "Hardware Disabled" when disabled by HW switch, and
generically "Disabled" when airplane mode is active, as
indicated by v4 mockups.
Note that bluetooth is not affected by NM handling of airplane
mode (and generally the firmware makes the USB bluetooth
adapter disappear when rfkilled), so this is in NMDeviceModem
instead of NMConnectionDevice.

https://bugzilla.gnome.org/show_bug.cgi?id=709043

js/ui/status/network.js

@@ -460,6 +460,17 @@ const NMDeviceModem = new Lang.Class({
         this.parent();
     },
 
+    _getStatus: function() {
+        if (!this._client.wwan_hardware_enabled)
+            return _("Hardware Disabled");
+        else if (!this._client.wwan_enabled)
+            /* Translators: this is for a network device that cannot be activated
+               because it's disabled by rfkill (airplane mode) */
+            return _("Disabled");
+        else
+            return this.parent();
+    },
+
     _getMenuIcon: function() {
         if (this._device.active_connection)
             return this.getIndicatorIcon();