Comment 4 for bug 574393

Now I understand what you were getting at. My problem (at least one of them; I will file a separate bug on the other one) is that when I click the trough outside the actual slider, the slider moves to the extreme end of the trough, rather than a) incrementing the slider along the trough, or b) positioning the slider where I clicked. Either of these fixes will be just fine (and frankly, given the above discussion on set zoomlevels, makes more sense). I am also marking this bug as incomplete, since my changes pretty basically affected the bug.