Replace wxDataViewCtrl::StartEditor() with EditItem().

This is more consistent with other wxDVC methods (taking column pointer
as its argument) and other DVC-like classes where the name EditLabel()
is used for similar purposes.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70377 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/dataview.h

@@ -160,7 +160,7 @@ public:
 
     virtual bool SetRowHeight( int rowHeight );
 
-    virtual void StartEditor( const wxDataViewItem & item, unsigned int column );
+    virtual void EditItem(const wxDataViewItem& item, const wxDataViewColumn *column);
 
     virtual void Expand( const wxDataViewItem & item );
     virtual void Collapse( const wxDataViewItem & item );