fix validate tab list unique

client/src/views/preferences/fields/dashboard-tab-list.js

@@ -40,6 +40,8 @@ define('views/preferences/fields/dashboard-tab-list', ['views/fields/array'], fu
             list.forEach(value => {
                 this.translatedOptions[value] = value;
             });
+
+            this.validations.push('uniqueLabel');
         },
 
         getItemHtml: function (value) {
@@ -85,6 +87,28 @@ define('views/preferences/fields/dashboard-tab-list', ['views/fields/array'], fu
                 .get(0).outerHTML;
         },
 
+        validateUniqueLabel: function () {
+            let keyList = this.model.get(this.name) || [];
+            let labels = this.model.get('translatedOptions') || {};
+            let metLabelList = [];
+
+            for (let key of keyList) {
+                let label = labels[key];
+
+                if (!label) {
+                    return true;
+                }
+
+                if (metLabelList.indexOf(label) !== -1) {
+                    return true;
+                }
+
+                metLabelList.push(label);
+            }
+
+            return false;
+        },
+
         fetch: function () {
             let data = Dep.prototype.fetch.call(this);