Pinned cols with virtualization having left margin

[cookednoodles]

After e7bd6f2

It appears that restyle is adding a left margin on pins cols because the !renderContainer.disableColumnOffset condition is no longer being checked, this is leading to the pinned col disappearing when virtualized.

This is reproducible when scrolling to the far right on http://ui-grid.info/docs/#/tutorial/203_pinning

[c0bra]

I'm not seeing any bad behavior on that tutorial. The pinned columns stay right where they are.

[cookednoodles]

This is interesting, its only seems to be happening when not at full width