Set the rectangle of wxGridCellChoiceEditor to be at least as tall as the best (i.e. minimal) wxComboBox size because otherwise the control can be unusable. Closes #13818. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70693 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775