Launch elementary test "Scroller 3".
- Add Some items until the scrollbar is displayed. you can see the up arrow does not become grey.
Move the scrollbar a bit and it becomes grey.
- when you move the scrollbar up, the scroller contents are scrolled downed (but the scrollbar is at the top). I guess there is conflict with thumb scroll here.
- on 1.18.2, setting the gravity to 1 does not seem to work, but it works on git.