Virtualize StartEditor and add implementations for the ports that can do it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67817 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/dataview.mm

@@ -2314,6 +2314,11 @@ void wxCocoaDataViewControl::Resort()
     [m_OutlineView reloadData];
 }
 
+void wxCocoaDataViewControl::StartEditor( const wxDataViewItem & item, unsigned int column )
+{
+    [m_OutlineView editColumn:column row:[m_OutlineView rowForItem:[m_DataSource getDataViewItemFromBuffer:item]] withEvent:nil select:YES];
+}
+
 //
 // other methods (inherited from wxDataViewWidgetImpl)
 //