improve view.rng for groups

bzr revid: hda@tinyerp.com-20080819100740-omxm6dtzu2w7e42v

bin/addons/base/rng/view.rng

@@ -186,6 +186,7 @@
                     <rng:ref name="separator"/>
                     <rng:ref name="xpath"/>
                     <rng:ref name="button"/>
+                    <rng:ref name="group"/>
                     <rng:element name="newline"><rng:empty/></rng:element>
                 </rng:choice>
             </rng:zeroOrMore>