Make sure language cookie is set globally.

Setting language in submission list pages etc. makes the cookie local in
the path of the page.
Usually this behavior is not desired. This commit forces the cookie to
be set globally.

Author: qnighy

cms/server/static/cws_utils.js

@@ -217,15 +217,19 @@ CMS.CWSUtils.prototype.update_time = function() {
     }
 };
 
-CMS.CWSUtils.switch_lang = function() {
+CMS.CWSUtils.prototype.switch_lang = function() {
+    var cookie_path = this.url_root + "/";
     var lang = $("#lang").val();
     if (lang === "") {
-        document.cookie = "language=; expires=Thu, 01 Jan 1970 00:00:00 GMT";
+        document.cookie = "language="
+            + "; expires=Thu, 01 Jan 1970 00:00:00 GMT"
+            + "; path=" + cookie_path;
     } else {
         var expires = new Date();
         expires.setFullYear(expires.getFullYear() + 1);
         document.cookie = "language=" + lang
-            + "; expires=" + expires.toUTCString();
+            + "; expires=" + expires.toUTCString()
+            + "; path=" + cookie_path;
     }
     location.reload();
 };

cms/server/templates/contest/base.html

@@ -51,7 +51,7 @@
                     <a class="brand" href="{{ url_root }}/">{{ contest.description }}</a>
 {% if len(langs) > 1 %}
                     <p class="navbar-text pull-right">
-                        <select id="lang" class="form-control btn btn-info" onchange="CMS.CWSUtils.switch_lang()">
+                        <select id="lang" class="form-control btn btn-info" onchange="utils.switch_lang()">
                             <option value=""{% if cookie_lang is None %} selected{% end %}>{{ _("Automatic (%s)") % lang_names[browser_lang] }}</option>
                         {% for lang_code, lang_name in sorted(lang_names.iteritems(), key=lambda x: x[1]) %}
                             <option value="{{ lang_code }}"{% if cookie_lang == lang_code %} selected{% end %}>{{ lang_name }}</option>