student setup gender fix

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

@@ -111,7 +111,7 @@
                 <div class="form-group">
                 <div class="form-group">
                   <label translate>gender</label>
                   <label translate>gender</label>
                   <select class="form-control" name="student_gender" id="student_gender" ng-model="formUser.gender" required>
                   <select class="form-control" name="student_gender" id="student_gender" ng-model="formUser.gender" required>
-                    <option value=" ">&nsp;</option>
+                    <option value=" " disabled></option>
                     <option value="F" translate>woman</option>
                     <option value="F" translate>woman</option>
                     <option value="M" translate>man</option>
                     <option value="M" translate>man</option>
                   </select>
                   </select>