slapos_pdm: Fixup for make CodingStyle Test happy

master/bt5/slapos_pdm/SkinTemplateItem/portal_skins/slapos_pdm/SoftwareProduct_view/my_translated_validation_state_title.xml

@@ -77,6 +77,10 @@
             <key> <string>values</string> </key>
             <value>
               <dictionary>
+                <item>
+                    <key> <string>css_class</string> </key>
+                    <value> <string></string> </value>
+                </item>
                 <item>
                     <key> <string>field_id</string> </key>
                     <value> <string>my_translated_validation_state_title</string> </value>