fix: left frozen section shoudn't go over viewport width, fix #473 (#607)
fix: left frozen section shoudn't go over viewport width, fix #473 (#607)

- fixes #473
- with frozeen grid, we have 2 horizontal scrolling and if any of the column width on the left section goes over the viewport total width then we completely lose the scrolling on the right section (as described in issue #473)
6pac/SlickGrid,6pac/SlickGrid