[IMP] Rng : Accepting Groups under/after/replacing Buttons

bzr revid: jvo@tinyerp.com-20090915071323-c4hcvh1uzg18p7si

bin/addons/base/rng/view.rng

@@ -378,6 +378,7 @@
                     <rng:ref name="page" />
                     <rng:ref name="separator"/>
                     <rng:ref name="button"/>
+                    <rng:ref name="group"/>
                     <rng:element name="properties"><rng:empty/></rng:element>
                     <rng:element name="newline"><rng:empty/></rng:element>
                 </rng:choice>