Fix issue: Check In QR code doesn't refresh list with status when exiting scanning mode (closes #164)

public/assets/javascript/check_in.js

@@ -163,6 +163,7 @@ var checkinApp = new Vue({
             this.showScannerModal = false;
             track = this.stream.getTracks()[0];
             track.stop();
+            this.fetchAttendees();
         }
     }
 });