Fix titles for widgets

Add translations

config/locales/en.yml

@@ -200,6 +200,10 @@ en:
     options: Options
     orig_upload_file: Original filename
     page: Page
+    page_part_kinds:
+      text: Text Area
+      public_r_tag: System Widget
+      module_widget: Plug-in Module Widget
     position: Position
     published?: Published?
     purchase: Purchase

config/locales/zh_tw.yml

@@ -195,6 +195,10 @@ zh_tw:
     options: 選項
     orig_upload_file: 原上傳檔名
     page: 頁面管理
+    page_part_kinds:
+      text: 文字區塊
+      public_r_tag: 系統模塊
+      module_widget: 外掛模塊
     position: 位置
     published?: 發布?
     purchase: 購買