Removing the username from the mention button.

Gab has some very long usernames which will break the button.

app/javascript/gabsocial/locales/zh-TW.json

@@ -18,7 +18,7 @@
   "account.link_verified_on": "此連結的所有權已在 {date} 檢查",
   "account.locked_info": "此帳號的隱私狀態被設為鎖定，擁有者將手動審核可關注此帳號的人。",
   "account.media": "媒體",
-  "account.mention": "提及 @{name}",
+  "account.mention": "提及",
   "account.moved_to": "{name} 已遷移至：",
   "account.mute": "靜音 @{name}",
   "account.mute_notifications": "靜音來自 @{name} 的通知",