fix ordering on comps entries in rng

comps.rng

@@ -33,6 +33,7 @@
     <element name="group">
       <!-- Example documentation. Please add more. -->
       <a:documentation>This defines a package group.</a:documentation>
+      <interleave>
        <ref name="id"/>
        <element name="default" a:defaultValue="true">
          <a:documentation>Should the group be enabled by default?</a:documentation>
@@ -42,6 +43,11 @@
          <a:documentation>Should the group be visible to users?</a:documentation>
          <ref name="boolean"/>
        </element>
+       <optional>
+         <element name="display_order">
+           <ref name="positiveInteger"/>
+         </element>
+       </optional>
        <optional>
          <element name="langonly">
            <ref name="locale"/>
@@ -51,6 +57,7 @@
          <ref name="groupreqlist"/>
        </optional>
        <ref name="packagelist"/>
+      </interleave>
     </element>
   </define>
   <define name="groupreqlist">