Apply workaround with class misorder.

variation_category_list is redefined in this property sheet.

master/bt5/slapos_cloud/PortalTypePropertySheetTemplateItem/property_sheet_list.xml

@@ -10,6 +10,9 @@
   <item>TextDocument</item>
   <item>VariationRange</item>
  </portal_type>
+ <portal_type id="Software Installation">
+  <item>VariationRange</item>
+ </portal_type>
  <portal_type id="Software Instance">
   <item>Reference</item>
   <item>SoftwareInstance</item>

master/bt5/slapos_cloud/bt/revision

-61
\ No newline at end of file
+62
\ No newline at end of file

master/bt5/slapos_cloud/bt/template_portal_type_property_sheet_list

@@ -5,6 +5,7 @@ Slave Instance | SlaveInstanceConstraint
 Slave Instance | SoftwareInstance
 Slave Instance | TextDocument
 Slave Instance | VariationRange
+Software Installation | VariationRange
 Software Instance | Reference
 Software Instance | SoftwareInstance
 Software Instance | SoftwareInstanceConstraint