Hide buttons for group creation, update, and leave

// FREEBIE

background.html

@@ -16,7 +16,7 @@
     <div class='gutter'>
         <div class='tool-bar clearfix'>
           <input type='text' class='search' placeholder='Search'>
-          <button class='show-new-conversation'></button>
+          <!-- <button class='show-new-conversation'></button> -->
         </div>
         <div class='conversations scrollable inbox'></div>
         <div class='conversations scrollable search-results hide'>
@@ -33,8 +33,8 @@
             <ul class='menu-list'>
                 {{#group}}
                     <li><a class='view-members'>Members</a></li>
-                    <li><a class='update-group'>Update group</a></li>
-                    <li><a class='leave-group'>Leave group</a></li>
+                    <!-- <li><a class='update-group'>Update group</a></li> -->
+                    <!-- <li><a class='leave-group'>Leave group</a></li> -->
                 {{/group}}
                 {{^group}}
                     <li><a class='end-session'>Reset Session</a></li>