Removing columns interferes with frozen columns

From @ryanjmackinnon on April 3, 2017 13:25

When I have a grid with frozen columns and remove columns meaning there are now less columns than the frozen column count, I get odd behaviour including a spurious column being left in, and the styling showing the frozen class still applied to the columns.
For example Grid has columns A-G. C is the last frozen column. I remove columns A-E and G leaving only F visible. As part of this process I set frozenColumnCount to 0.
Expected: to see only column F and it not be frozen.
Actual: I see F and G, and F has frozen styling.
It appears that the setFrozenColumnCount is not being applied when column changes are also applied.

If I remove A-D first, and then E&G separately, F is then displayed correctly.
If I use setHidden(true) instead of removing the columns, it also works, but we are not wanting to do this for out application

Example grid page showing a variation of the issue here:
MyUI.txt

Copied from original issue: vaadin/vaadin-grid#844

Start with the attached MyUI.txt example and reproduce the case where columns A-E and G are removed while frozenColumnCount is set to 0. Trace the grid's column-removal and frozen-column update handling; done means only column F remains visible and it no longer has frozen styling.