Shaobin Jiang

Added a commit that I think will fix this issue. But still I am going to leave it open for now before further testing is done.

Seems that commenting the code is unnecessary. Installing xclip alone solves the problem for me. Maybe the instruction about xclip not required on wsl should be removed from README.

This might be an issue with surveyJS. You can check its official demo [here](https://surveyjs.io/form-library/examples/configure-form-navigation-with-progress-indicators/reactjs), where you can see that selecting `belowHeader` or `aboveHeader` does not make a difference.

This is expected behavior of the image-slider-response plugin, as the participant ought to submit their response via a button click and the absence of that button click indicates no response....

One way of doing it would be to not set `trial_duration` at all, but to listen to the `ended` event of the video element yourself and end the trial manually...

I can't since I have zero experience with Java development. If it is just a matter of completion / diagnostics / ..., it is easy enough to support it on...