headerWordWrap doesn't work if a preceding column is invisible

Steps to reproduce:
1. import and run the attached project
2. click the checkboxes to hide the column prior and after the column with wrapped header
3. watch the column with word-wrap header and see how the text is (not) wrapped

Actual Results: header text is not wrapped to fit the column width

Expected Results: header text should be wrapped

Workaround: none