Included "Master" class for the sections

Master is used by the first slide usually.

bt5/erp5_run_my_doc/SkinTemplateItem/portal_skins/erp5_run_my_doc/TestPageModule_viewChapterCreationWizard/your_slide_type.xml

@@ -113,6 +113,10 @@
                           <string>Code</string>
                           <string>Code</string>
                         </tuple>
+                        <tuple>
+                          <string>Master</string>
+                          <string>Master</string>
+                        </tuple>
                       </list>
                     </value>
                 </item>

bt5/erp5_run_my_doc/bt/revision

-43
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+44
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