userpage: change email (+ confirmation)

edit/add button added for email address. Confirmation works too.

lang/admin/zh-hant.json

@@ -18,7 +18,6 @@
         "create": "創建",
         "apply": "應用",
         "delete": "刪除",
-        "add": "添加",
         "select": "選擇",
         "name": "帳戶名稱",
         "date": "日期",
@@ -49,7 +48,6 @@
         "conditionals": "條件",
         "preview": "預覽",
         "reset": "重設",
-        "edit": "編輯",
         "donate": "捐贈",
         "sendPWR": "發送密碼重置",
         "contactThrough": "聯繫方式：",