Enable WidgetHeight hint ComboBox for all qt style
Fix for !6751 (merged)
For some qt style default (such as fusion, e.g ./paraview -style=fusion), the new WidgetHeight hint combobox property didn't work.
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Fix for !6751 (merged)
For some qt style default (such as fusion, e.g ./paraview -style=fusion), the new WidgetHeight hint combobox property didn't work.