Ensure returned receivers from StatusManager have a valid status

ext/src/background/StatusManager.ts

@@ -55,8 +55,13 @@ export default new class StatusManager
         }
     }
 
-    public getReceivers () {
+    public * getReceivers() {
-        return Array.from(this.receivers.values());
+        for (const [, receiver ] of this.receivers) {
+            if (receiver.status && receiver.status.application
+                                && receiver.status.volume) {
+                yield receiver;
+            }
+        }
     }
 
     private async createBridgePort () {

ext/src/background/receiverSelector/ReceiverSelectorManager.ts

@@ -102,7 +102,7 @@ async function getSelection (
         await StatusManager.init();
 
         sharedSelector.open(
-                StatusManager.getReceivers()
+                Array.from(StatusManager.getReceivers())
               , defaultMediaType
               , availableMediaTypes);
     });