DoxygenLayout.xml: make C++ doc order a little like the C doc

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

DoxygenLayout.xml

@@ -24,10 +24,11 @@
 
   <!-- Layout definition for a class page -->
   <class>
-    <briefdescription visible="yes"/>
+    <briefdescription visible="no"/>
     <includes visible="$SHOW_INCLUDE_FILES"/>
     <inheritancegraph visible="$CLASS_GRAPH"/>
     <collaborationgraph visible="$COLLABORATION_GRAPH"/>
+    <detaileddescription title=""/>
     <memberdecl>
       <nestedclasses visible="yes" title=""/>
       <publictypes title=""/>
@@ -62,7 +63,6 @@
       <related title="" subtitle=""/>
       <membergroups visible="yes"/>
     </memberdecl>
-    <detaileddescription title=""/>
     <memberdef>
       <inlineclasses title=""/>
       <typedefs title=""/>