[mirotalksfu] - improve open Nav

public/js/Room.js

@@ -69,6 +69,7 @@ function getRandomNumber(length) {
 
 function initClient() {
     if (!DetectRTC.isMobileDevice) {
+        setTippy('openNavButton', 'Open', 'right');
         setTippy('closeNavButton', 'Close', 'right');
         setTippy('whiteboardPencilBtn', 'Drawing mode', 'top');
         setTippy('whiteboardObjectBtn', 'Object mode', 'top');

public/view/Room.html

@@ -96,7 +96,7 @@ access to use this app.
             </pre>
         </div>
 
-        <button id="openNavButton" class="hidden">&#9776; menu</button>
+        <button id="openNavButton" class="hidden">&#9776;</button>
         <div id="control" class="sidenav hidden">
             <button id="closeNavButton" class="closebtn">&times;</button>
             <button id="shareButton" class="hidden"><i class="fas fa-share-alt"></i> Share</button>