Set styling of “rebuild metadata” button to default

Author: joewiz

admin.html

@@ -55,7 +55,7 @@ <h3><span data-template="app:package-group-abbrev"/></h3>
                 </a>
             </p>
             <p>
-                <a href="?rebuild-package-groups-metadata=true" class="btn btn-primary">
+                <a href="?rebuild-package-groups-metadata=true" class="btn btn-default">
                     <i class="glyphicon glyphicon-repeat"/> Rebuild package-groups metadata 
                 </a>
             </p>