Example program crash on removing filter set
The issue applies to Qt 4.8.x and 5.x.
class QTableModelWriter ignores filter settings
Bug isn't fixed. The wrong cells are still exported.
value map implementation changed from QMap to QHash to improve performance
QUniqueValuesProxyModel shows low performance on large models
table view header stae is not restored properly
Missing calls QHeaderView::restoreState() implemented