slapos_accounting: only show the reversal action to accountant

master/bt5/slapos_accounting/ActionTemplateItem/portal_types/Sale%20Invoice%20Transaction/create_slapos_reversal.xml

@@ -88,7 +88,7 @@
       <dictionary>
         <item>
             <key> <string>text</string> </key>
-            <value> <string>python: object.getSimulationState() in (\'stopped\', ) and not object.SaleInvoiceTransaction_isLettered()</string> </value>
+            <value> <string>python: object.getSimulationState() in (\'stopped\', ) and (not object.SaleInvoiceTransaction_isLettered()) and portal.Base_checkPermission(\'accounting_module\', \'Add portal content\')</string> </value>
         </item>
       </dictionary>
     </pickle>