feat: 在綫聊天新增facebook洽談外掛程式 closed #918

feat: 添加artalk評論 closed #933
fix: 修復 開啟 archor 後， facebook評論加載不正確的 bug
fix: 修復 facebook 評論數無法加載的 bug

source/css/_layout/chat.styl

@@ -6,3 +6,12 @@ if hexo-config('chat_btn') == true && hexo-config('chatra.enable')
     height: 1px !important
     opacity: 0 !important
     pointer-events: none
+
+if hexo-config('chat_btn') == true && hexo-config('messenger.enable')
+  .fb_dialog,
+  .fb-customerchat
+    visibility: hidden !important
+    width: 1px !important
+    height: 1px !important
+    opacity: 0 !important
+    pointer-events: none