Improve storing of DataGrid column visibility.
DataGrid.prototype.setColumnVisible could be potentially improved so that if a column's hidden value is default for that column, nothing is stored in the setting.
I think I already handle this in my new patches on bug 29687. Is there something that doesn't cover?
(In reply to comment #1)
> I think I already handle this in my new patches on bug 29687. Is there
> something that doesn't cover?
Oops, I hadn't finishing looking over your updated patch.