Part II of: Add GetChoice() and GetChoices() getters to all choice renderers and actually mention it in the docs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64323 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/dvrenderers.h

@@ -268,6 +268,9 @@ public:
 
     void SetAlignment( int align );
 
+    wxString GetChoice(size_t index) const { return m_choices[index]; }
+    const wxArrayString& GetChoices() const { return m_choices; }
+
 private:
     wxArrayString m_choices;
     wxString      m_data;