Update documentation to include wxDataViewCtrl in the list of controls supported by the default persistent objects implementation.

docs/doxygen/overviews/persistence.h

@@ -50,6 +50,8 @@ Currently the following classes are supported:
 
 - wxTopLevelWindow (and hence wxFrame and wxDialog)
 - wxBookCtrlBase (i.e. wxNotebook, wxListbook, wxToolbook and wxChoicebook)
+- wxDataViewCtrl and its derivatives 
+  (i.e. wxDataViewListCtrl and wxDataViewTreeCtrl)
 - wxTreebook
 
 To automatically save and restore the properties of the windows of classes

interface/wx/persist.h

@@ -204,6 +204,9 @@ protected:
 /**
     Base class for persistent object adapters.
 
+    See @ref overview_persistence for an overview of persistent objects within
+    wxWidgets.
+
     wxWidgets persistence framework is non-intrusive, i.e. can work with the
     classes which have no relationship to nor knowledge of it. To allow this,
     an intermediate persistence adapter is used: this is just a simple object