add buttons.clone

dashboard-v4/dashboard/src/locales/en-US/buttons.ts

@@ -107,6 +107,7 @@ const items = {
   "buttons.set.milestone": "set as milestone",
   "buttons.next": "Next",
   "buttons.previous": "Previous",
+  "buttons.clone": "Clone",
 };
 
 export default items;

dashboard-v4/dashboard/src/locales/zh-Hans/buttons.ts

@@ -108,6 +108,7 @@ const items = {
   "buttons.set.milestone": "设置为里程碑",
   "buttons.next": "下一步",
   "buttons.previous": "上一步",
+  "buttons.clone": "克隆",
 };
 
 export default items;