[pygtk] Retrieve remaining column widths directly after removing column from treeview

[Calum Lind]

I have an issue where shutting down the application a remove_column method
is called just before saving the column state to a file which results in the
width data for all the columns being zero. Disabling the treeview
remove_column method the column width data is stored properly.

How do this width data get generated and is there any way to force this
update?

I have attached a code example.

Thanks

Calum
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