Do not change location hash when toggle menu or open preferences

The default event must be prevented to not update the location hash.

issue7588
review74271002

index.html

@@ -47,7 +47,7 @@ this repository contains the full copyright notices and license terms. -->
                         <span class="icon-bar"></span>
                         <span class="icon-bar"></span>
                     </button>
-                    <a class="navbar-brand" href="#" data-toggle="offcanvas">
+                    <a class="navbar-brand" href="javascript:void()" data-toggle="offcanvas">
                         <span class="glyphicon glyphicon-menu-hamburger"></span>
                         Tryton
                     </a>

src/sao.js

@@ -594,7 +594,10 @@ var Sao = {};
         jQuery('#user-preferences').append(jQuery('<a/>', {
             'href': '#',
             'title': preferences.status_bar,
-        }).click(Sao.preferences).append(preferences.status_bar));
+        }).click(function(evt) {
+            evt.preventDefault();
+            Sao.preferences();
+        }).append(preferences.status_bar));
         var title = Sao.i18n.gettext("Logout");
         jQuery('#user-logout').append(jQuery('<a/>', {
             'href': '#',