Fix autosize invalidations occurring with BypassAutoSIzeAxes

[smoogipoo]

In the case of, e.g.:

container1 = Container
    AutoSizeAxes = Axes.Both
    Children =
        {{ other children }}
        container2 = Container
            AutoSizeAxes = Axes.Both // Want to maintain a size
            BypassAutoSizeAxes = Axes.Both // But we don't want the parent to size to us

If the size of container2 was changed, it will propagate a DrawSize invalidation to container1 which will cause container1 to recompute its autosize.
When container1 recomputes its autosize, it finds that container2 has BypassAutoSizeAxes, so skips it.

This extra computation is unnecessary.