trial_request: Allow direct invalidate from draft

master/bt5/slapos_trial_request/WorkflowTemplateItem/portal_workflow/trial_request_workflow/states/draft.xml

@@ -30,6 +30,8 @@
               <tuple>
                 <string>delete</string>
                 <string>delete_action</string>
+                <string>invalidate</string>
+                <string>invalidate_action</string>
                 <string>submit</string>
                 <string>submit_action</string>
                 <string>validate</string>