840fc4d170
Have an explicit per-column dirty flag and use that to determine whether we need to call wxHeaderCtrl::UpdateColumn(). Previously, the lack of computed best width was used as an indicator, but this didn't work correctly if some code called GetWidth() after invalidation but before wxDataViewCtrl::UpdateColWidths() was called at idle time. This resulted in header's column widths getting out of sync with the control itself. Fixes #14167. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71335 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775