Rewritten in-place editing for generic wxDataViewCtrl

moving the code (partly) to the renderer and away
    from the wxDataViewCtrl class. Adding new in-plae
    editors (wxChoice) should be much simpler now.
  Also implemented using Validate() before committing
    a change to the data model.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45497 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dataview.h

@@ -280,7 +280,7 @@ public:
     //       to combine alignment flags (e.g. wxALIGN_LEFT|wxALIGN_BOTTOM)
     virtual void SetAlignment( int align ) = 0;
     virtual int GetAlignment() const = 0;
-
+    
 protected:
     wxString                m_variantType;
     wxDataViewColumn       *m_owner;