I got 2 patchs and author admit them to be in Public Domain.
They can be download from authors website:
This will enable turning page once view reach the edge.
This will let you set DPI (54-300) with "NUMBER"d, similar to page jump with 123g.
I found they are useful. Hope they can be integrated into main.
well, are these features not planned or just not accepted?
*** This bug has been marked as a duplicate of bug 691330 ***