fix(GridRenderContainer): Redraw with scroll %

Use previous scroll percentage to redraw, not the previous scrollLeft
value. The scrollLeft is too imprecise and is causing large canvases to
redraw out of place. To reproduce, you could scroll the "Horizontal
Scrolling" tutorial all the way right and then sort (or manually call
grid.refresh()). Changing redrawInPlace() to use the previous scroll
percentages fixes the issue.

Fixes #2357