Scrolling and render issues on Microsoft Edge Browser and IE11

[miszou]

Tested with http://ui-grid.info/docs/#/tutorial/203_pinning on Windows 10, Edge Browser 20.10240.x and IE11.0.10240.x

If you have a pinnedLeft column you can only scroll-y on the non pinned container.

When you have a pinnedRight column, you are no longer able to scroll-y when hovering over the other columns (other ui-grid-viewports), only in the pinnedRight container.
And if you scroll-y in the pinnedRight container, the other container rows are jittering (scroll and render slower than the pinnedRight ones).

Horizontal scroll works (but the header columns have a slight render tearing, tolerate-able).