Trackpad sensivity to high in macOS

[gustavopi]

When moving the document with two fingers in the trackpad, the screen go to fast (go crazy) because is so much more sensible to fingers move than the rest of apps. This seems to be something about the code exporting (I saw the same issue in some apps made in VSCode) but maybe would be a good idea to put an option in the interface preferences so the user can tune the trackpad for Scribus.