disable right click back

Hi,
I don’t know wether it’s skin related.
I use Krypton with my Raspberry Pi 3 (OSMC) and an egalax touchscreen.
When scrolling through long lists by using the scroll bar from time to time it happens that I accidentally hit a blank area. The result is that I go back to the home screen. That’s pretty annoying. I already changed includes.xml to have a wider scroll bar.

Is it possible to disable the right click on blank area function without losing the possibility to call the context menu? Or do you have any other thoughts to improve that accidentally go to home screen behaviour?