anchor.diff:      var existing_props = get_existing_tenant_plugin_properties(plugin_name);
   
       var merged_props_with_values = existing_props;
  -    $.each(props, function(idx, p) {
  -      if (merged_props_with_values[p] == undefined) {
  -         merged_props_with_values[p] = '';
  -      }
  -    });
  +    if (props != undefined) {
  +        $.each(props, function(idx, p) {
  +            if (merged_props_with_values[p] == undefined) {
  +               merged_props_with_values[p] = '';
  +            }
  +        });
  +    }
   
       $.each(merged_props_with_values, function(p, v) {
           add_property_form_entry(format_label(p), p, v);
  
positive.code: 
      var tenant_plugin_properties = $('#plugin_name').attr('tenant_plugin_config');
      var res = {}
      $.each(tenant_plugin_properties.split(';'), function(idx, el) {
          var el_parts = el.split('::');
          var el_plugin_name = el_parts[0];
          var el_props = el_parts[1];
          if (el_plugin_name == plugin_name) {
              $.map(el_props.split(','), function(el) {
                  var parts = el.split('=');
                  res[parts[0]] = parts[1];
              });
              return false;
          }
      });
      return res;
  }
  
  
negative.code:     var clone = $('#PluginConfig form div').first().clone();
      clone.children("label").attr('for', property).text(property_label);
      clone.children("div").first().attr("name", property).attr("id", property);
      var input = clone.children("div").children("input").first();
      input.removeAttr('autocomplete').removeAttr('plugin_config');
      if (property == 'raw_config') {
         var text_area = $('<textarea name="plugin_properties[raw_config]" id="raw_config" rows="10" class="form-control">');
         input.replaceWith(text_area);
         text_area.attr("name", "plugin_properties[" + property + "]")
           .attr("id", property)
           .attr('class', 'form-control')
           .val(current_value);
  
         input.replaceWith('<textarea name="plugin_properties[raw_config]" id="raw_config" rows="10" class="form-control">').text(current_value);
      } else {
          input.attr("name", "plugin_properties[" + property + "]")
           .attr("id", property)
           .attr('class', 'form-control')
           .val(current_value);
     }
  
      /* Attach clone object  */
      $('#plugin_config_properties_anchor').append(clone);
  