Put camera back to Idle if no response.

src/Camera/QGCCameraControl.cc

@@ -719,10 +719,11 @@ QGCCameraControl::_mavCommandResult(int vehicleId, int component, int command, i
             switch(command) {
                 case MAV_CMD_IMAGE_START_CAPTURE:
                 case MAV_CMD_IMAGE_STOP_CAPTURE:
-                    if(++_captureInfoRetries < 5) {
+                    if(++_captureInfoRetries < 3) {
                         _captureStatusTimer.start(1000);
                     } else {
-                        qCDebug(CameraControlLog) << "Giving up requesting capture status";
+                        qCDebug(CameraControlLog) << "Giving up start/stop image capture";
+                        _setPhotoStatus(PHOTO_CAPTURE_IDLE);
                     }
                     break;
                 case MAV_CMD_REQUEST_CAMERA_CAPTURE_STATUS: