fix 422050 "Scrolling issues with PageDown/PageUp navigation"

Low effort merge request, I'm in the middle of my exams and this is the worst time of the year for me to keep up with bug reports.

I'll come back next month when I have time, it's easy to have a "no compromise" solution for this problem but I cannot allocate the 2-3 hours to do the work and test everything while keeping my mental sanity right now. Sorry for that

The patch disables the smoothness of the page up / down action

Have a nice day