remove double data-toggle attribute

Author: onokumus

src/templates/partials/nav.hbs

@@ -34,7 +34,7 @@
                 <a data-placement="bottom" data-original-title="Document" href="#" data-toggle="tooltip" class="btn btn-default btn-sm">
                     <i class="icon-file"></i>
                 </a>
-                <a data-toggle="modal" data-original-title="Help" data-placement="bottom" data-toggle="tooltip" class="btn btn-default btn-sm" href="#helpModal">
+                <a data-toggle="modal" data-original-title="Help" data-placement="bottom" class="btn btn-default btn-sm" href="#helpModal">
                     <i class="icon-question-sign"></i>
                 </a>
             </div>