improve i18n

packages/app/resource/locales/en_US/translation.json

@@ -155,8 +155,8 @@
   "Sign out": "Logout",
   "Disassociate": "Disassociate",
   "No bookmarks yet": "No bookmarks yet",
-  "add_bookmark": "Add a bookmark",
-  "delete_bookmark": "Delete a bookmark",
+  "add_bookmark": "Add to bookmarks",
+  "remove_bookmark": "Remove from bookmarks",
   "Recent Created": "Recent Created",
   "Recent Changes": "Recent Changes",
   "Page Tree": "Page Tree",

packages/app/resource/locales/ja_JP/translation.json

@@ -158,7 +158,7 @@
   "Sidebar mode on Editor": "サイドバーモード(編集時)",
   "No bookmarks yet": "No bookmarks yet",
   "add_bookmark": "ブックマークに追加",
-  "delete_bookmark": "ブックマークを削除",
+  "remove_bookmark": "ブックマークから削除",
   "Recent Created": "最新の作成",
   "Recent Changes": "最新の変更",
   "Page Tree": "ページツリー",

packages/app/resource/locales/zh_CN/translation.json

@@ -164,7 +164,7 @@
   "Disassociate": "解除关联",
   "No bookmarks yet": "暂无书签",
   "add_bookmark": "添加到书签",
-  "delete_bookmark": "删除书签",
+  "remove_bookmark": "从书签中删除",
 	"Recent Created": "最新创建",
   "Recent Changes": "最新修改",
   "Page Tree": "页面树",

packages/app/src/components/Common/Dropdown/PageItemControl.tsx

@@ -86,7 +86,7 @@ const PageItemControl: FC<PageItemControlProps> = (props: PageItemControlProps)
         {isEnableActions && (
           <DropdownItem onClick={bookmarkClickHandler}>
             <i className="fa fa-fw fa-bookmark-o"></i>
-            { bookmarkInfo.isBookmarked ? t('delete_bookmark') : t('add_bookmark') }
+            { bookmarkInfo.isBookmarked ? t('remove_bookmark') : t('add_bookmark') }
           </DropdownItem>
         )}
         {isEnableActions && (