Fix the handling of column-menu whereby there were multiple copies of
the menu in the DOM. Now only one exists and it will self-deregister
upon hide().
Also attempt to resolve the firefox issue with hidden columns taking up
calculated space in TDs even though not visible.
Fix the handling of column-menu whereby there were multiple copies of the menu in the DOM. Now only one exists and it will self-deregister upon hide().
Also attempt to resolve the firefox issue with hidden columns taking up calculated space in TDs even though not visible.
Fixes #57