slapos_accounting: Make complaint with renderjs_runner ui

   It requires args.

master/bt5/slapos_accounting/SkinTemplateItem/portal_skins/slapos_accounting/SaleInvoiceTransaction_createSlapOSReversalTransaction.xml

@@ -50,7 +50,7 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string></string> </value>
+            <value> <string>**kw</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>