add ability to show footer language selector on LMS

cms/envs/bok_choy.env.json

@@ -75,7 +75,7 @@
         "PREVIEW_LMS_BASE": "preview.localhost:8003",
         "ENABLE_CONTENT_LIBRARIES": true,
         "ENABLE_SPECIAL_EXAMS": true,
-        "SHOW_LANGUAGE_SELECTOR": true,
+        "SHOW_HEADER_LANGUAGE_SELECTOR": true,
         "ENABLE_EXTENDED_COURSE_DETAILS": true,
         "CUSTOM_COURSES_EDX": true
     },

cms/envs/common.py

@@ -227,8 +227,8 @@ FEATURES = {
 
     'ORGANIZATIONS_APP': False,
 
-    # Show Language selector
-    'SHOW_LANGUAGE_SELECTOR': False,
+    # Show the language selector in the header
+    'SHOW_HEADER_LANGUAGE_SELECTOR': False,
 
     # Set this to False to facilitate cleaning up invalid xml from your modulestore.
     'ENABLE_XBLOCK_XML_VALIDATION': True,

cms/templates/widgets/header.html

@@ -4,6 +4,7 @@
   from django.conf import settings
   from django.core.urlresolvers import reverse
   from django.utils.translation import ugettext as _
+  from openedx.core.djangoapps.lang_pref.api import header_language_selector_is_enabled, released_languages
 %>
 <div class="wrapper-header wrapper" id="view-top">
   <header class="primary" role="banner">
@@ -183,8 +184,8 @@
     </div>
 
     <div class="wrapper wrapper-r">
-      % if static.show_language_selector():
-        <% languages = static.get_released_languages() %>
+      % if header_language_selector_is_enabled():
+        <% languages = released_languages() %>
         % if len(languages) > 1:
         <nav class="user-language-selector" aria-label="${_('Language preference')}">
           <form action="/i18n/setlang/" method="post" class="settings-language-form" id="language-settings-form">