[mirotalksfu] - add pin chat button

public/views/Room.html

@@ -669,11 +669,12 @@ access to use this app.
             </main>
         </section>
 
-        <section id="chatRoom" class="chat-room center fadein">
+        <section id="chatRoom" class="chat-room fadein">
             <section id="msger" class="msger">
                 <header id="chatHeader" class="chat-header">
                     <div class="chat-header-title">
                         <button id="chatCloseButton" class="fas fa-times"></button>
+                        <button id="chatTogglePin" class="hidden"><i class="fas fa-map-pin"></i></button>
                         <button id="chatMaxButton" class="hidden"><i class="fas fa-expand"></i></button>
                         <button id="chatMinButton" class="hidden"><i class="fas fa-compress"></i></button>
                         <div style="margin-left: 10px" class="title">