fixed problem with personalized legend in student's pictos, (issue #650)

sails/src/api/models/StuPicto.js

@@ -86,7 +86,9 @@ module.exports = {
       status: 'invisible',
       status: 'invisible',
       highlight: false,
       highlight: false,
       color: null,
       color: null,
-      expression: null
+      expression: null,
+      legend: null,
+      legend_size: 'small'
     };
     };
 
 
     if (typeof attributes === 'object') {
     if (typeof attributes === 'object') {
@@ -117,6 +119,15 @@ module.exports = {
       if (!((/^(invisible|enabled|disabled)$/).test(validAttributes.status))) {
       if (!((/^(invisible|enabled|disabled)$/).test(validAttributes.status))) {
         delete validAttributes.status;
         delete validAttributes.status;
       }
       }
+      if (typeof validAttributes.expression !== 'string') {
+        delete validAttributes.expression;
+      }
+      if (typeof validAttributes.legend !== 'boolean') {
+        delete validAttributes.legend;
+      }
+      if (!((/^(small|large)$/).test(validAttributes.legend_size))) {
+        delete validAttributes.legend_size;
+      }
       if (typeof validAttributes.highlight !== 'boolean') {
       if (typeof validAttributes.highlight !== 'boolean') {
         delete validAttributes.highlight;
         delete validAttributes.highlight;
       }
       }

sails/src/assets/scripts/modules/student/views/pictoconfig.html

@@ -37,7 +37,7 @@
       -->
       -->
       <li class="list-group-item">
       <li class="list-group-item">
         <div class="checkbox">
         <div class="checkbox">
-          <label><input data-toggle="toggle" type="checkbox" ng-model="studentPicto.attributes.legend" ng-change="update_properties()" translate>legend</label> 
+          <input data-toggle="toggle" type="checkbox" ng-model="studentPicto.attributes.legend" ng-change="update_properties()"><label translate>legend</label> 
         </div>
         </div>
       </ul>
       </ul>
     </div>
     </div>