fix recording stop

this fix addresses the issue when stopping a recording in a subsequent
attemp to record

web/app/assets/javascripts/recordingModel.js

@@ -144,8 +144,10 @@
                     .done(function() {
                         waitingOnServerStop = false;
                         attemptTransitionToStop(recording.id, reason, detail);
+                        stoppingRecording = false
                     })
                     .fail(function(jqXHR) {
+                        stoppingRecording = false
                         if(jqXHR.status == 422) {
                             waitingOnServerStop = false;
                             attemptTransitionToStop(recording.id, reason, detail);
@@ -156,6 +158,7 @@
                             var details = {'recordingId': recording.id, 'reason' : 'rest', 'details' : arguments, isRecording: false}
                             $self.triggerHandler('stoppedRecording', details);
                             context.RecordingActions.stoppedRecording(details)
+                            stoppingRecording = false
                         }
                     });
             });