Merge pull request #597 from jitsi/fix-isvisible-early-call

Fix early call of SidePanel isVisible

index.html

                 </span>
             </span>
         </div>
-        <div id="chatspace" class="right-panel">
+        <div id="chatspace" class="right-panel" style="display:none;">
             <div id="nickname">
                 <span data-i18n="chat.nickname.title"></span>
                 <form>
                 </div>
             </div>
         </div>
-        <div id="contactlist" class="right-panel">
+        <div id="contactlist" class="right-panel" style="display:none;">
             <div class="title">
                 <i class="icon-contactList"><span data-i18n="contactlist"></span></i>
             </div>
             <ul id="contacts"></ul>
         </div>
-        <div id="settingsmenu" class="right-panel">
+        <div id="settingsmenu" class="right-panel" style="display:none;">
             <div class="icon-settings" data-i18n="settings.title"></div>
             <img id="avatar" src="images/avatar2.png"/>
             <div class="arrow-up"></div>