fix badge display on firefox

apparently, the use of `pull-right` requires the badges
to appear before the checkbox in order to display
correctly on firefox.

IPython/html/templates/tree.html

@@ -85,42 +85,42 @@ data-terminals-available="{{terminals_available}}"
                 <ul id="tree-selector-menu" class="dropdown-menu" role="menu" aria-labelledby="tree-selector-btn">
                   <li role="presentation">
                     <a role="menuitem">
+                      <span class="badge pull-right" id="badge-select-folders"></span>
                       <input type="checkbox" class="tree-selector" id="select-folders"></input>
                       <label for="select-folders">
                         <i class="folder_icon icon-fixed-width"></i>
                         Folders
                       </label>
-                      <span class="badge pull-right" id="badge-select-folders"></span>
                     </a>
                   </li>
                   <li role="presentation">
                     <a role="menuitem">
+                      <span class="badge pull-right" id="badge-select-notebooks"></span>
                       <input type="checkbox" class="tree-selector" id="select-notebooks"></input>
                       <label for="select-notebooks">
                         <i class="notebook_icon icon-fixed-width"></i>
                         All Notebooks
                       </label>
-                      <span class="badge pull-right" id="badge-select-notebooks"></span>
                     </a>
                   </li>
                   <li role="presentation">
                     <a role="menuitem">
+                      <span class="badge pull-right" id="badge-select-running-notebooks"></span>
                       <input type="checkbox" class="tree-selector" id="select-running-notebooks"></input>
                       <label for="select-running-notebooks">
                         <i class="running_notebook_icon icon-fixed-width"></i>
                         Running
                       </label>
-                      <span class="badge pull-right" id="badge-select-running-notebooks"></span>
                     </a>
                   </li>
                   <li role="presentation">
                     <a role="menuitem">
+                      <span class="badge pull-right" id="badge-select-files"></span>
                       <input type="checkbox" class="tree-selector" id="select-files"></input>
                       <label for="select-files">
                         <i class="file_icon icon-fixed-width"></i>
                         Files  
                       </label>
-                      <span class="badge pull-right" id="badge-select-files"></span>
                     </a>
                   </li>
                 </ul>