Add convenient wxListCtrl::AppendColumn() wrapper.

In the vast majority of cases, columns are just appended to the end and not
inserted at arbitrary positions in wxListCtrl so provide a convenient wrapper
to do this, especially as it's really trivial to do it now when it can be done
only once at wxListCtrlBase level.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70283 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/listctrlcmn.cpp

@@ -136,6 +136,14 @@ IMPLEMENT_DYNAMIC_CLASS(wxListEvent, wxNotifyEvent)
 // wxListCtrlBase implementation
 // ----------------------------------------------------------------------------
 
+long
+wxListCtrlBase::AppendColumn(const wxString& heading,
+                             int format,
+                             int width)
+{
+    return InsertColumn(GetColumnCount(), heading, format, width);
+}
+
 long
 wxListCtrlBase::InsertColumn(long col,
                              const wxString& heading,