libdatrwxx [WP][DOC]: replace group ID properties by group_properties

src/libs/libdatrwxx/doxygen_utilities.txt

@@ -35,7 +35,7 @@
   \section sec_util_properties Properties
 
     \sa \subpage page_properties
-    \sa \ref properties
+    \sa \ref group_properties
 
   \section sec_util_bytesex Bytesex
 

src/libs/libdatrwxx/properties.cc

 /*! \file properties.cc
  * \brief describe data properties (implementation)
  * 
- * \ingroup properties
+ * \ingroup group_properties
  * ----------------------------------------------------------------------------
  * 
  * \author Thomas Forbriger

src/libs/libdatrwxx/properties.h

 /*! \file properties.h
  * \brief describe data properties (prototypes)
  * 
- * \ingroup properties
+ * \ingroup group_properties
  * ----------------------------------------------------------------------------
  * 
  * \author Thomas Forbriger
@@ -43,7 +43,7 @@ namespace datrw {
 
   /*! \brief Handle information on file type, stream and file properties.
    *
-   * \defgroup properties Handle information on file type, stream and file
+   * \defgroup group_properties Handle information on file type, stream and file
    * properties
    */