Only show eyes if playback is set to real time

For the time being, the playback implementation is silly and will overload
the event loop.

EyeRecToo/src/post-processing/PostProcessingWidget.cpp

@@ -610,6 +610,7 @@ void PostProcessingWidget::present(const VideoFrame& videoFrame)
         tuple.field.timestamp = videoFrame.t;
     tuple.field.input = videoFrame.frame;
 
+    if (ui->realTimeCheckBox->isChecked()) { // TODO: only show eyes if playback in real time as to not overload the event loop
         if (ui->showEyesCheckBox->isChecked()) {
             // TODO:
             // temporary solution to get the eye projection, fix later
@@ -633,7 +634,7 @@ void PostProcessingWidget::present(const VideoFrame& videoFrame)
                 emit rightEyePresent(tuple.rEye);
             }
         }
-
+    }
     emit present(tuple);
 }