Barlines not drawn in edit mode (drag)

1) score with multiple staves, multiple pages
2) go to page 2
3) double-click a barline on a staff other than the bottom
4) drag it down

Result: you can see the handle as you drag, but the barline itself doesn't draw. It's actually being drawn on the first page. It fixes itself when you release, so not a huge deal.

The issue has got to be in BarLine::drawEditMode(). We're translating the view according to pagePos() when at the least it should be canvasPos(), but somehow that's not enough, this gets the line drawn on the right page but then it always draws relative to the top staff even when adjusting a barline on a lower staff. I guess the y1 & y2 would need to get updated too.