- add switch layout button

bigbluebutton-client/resources/prod/3rd-party.html

@@ -37,7 +37,9 @@
       <button type="button" onclick="unmuteMe()">Unmute Me</button>
       <button type="button" onclick="muteAll()">Mute All</button>
       <button type="button" onclick="unmuteAll()">Unmute All</button>
-      <button type="button" onclick="switchLayout('Default')">Switch Layout</button>
+      <button type="button" onclick="switchLayout('Video Chat')">Switch Video Layout</button>
+      <button type="button" onclick="switchLayout('Default')">Switch Default Layout</button>
+
     </div>
     <div id="content" style="display: none">
       <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="80%" height="80%" id="BigBlueButton" name="BigBlueButton" align="middle">