Merge pull request #8506 from edx/diana/fix-tab-duplication

Prevent duplication of tabs with different names.

cms/djangoapps/contentstore/views/course.py

@@ -999,7 +999,6 @@ def _refresh_course_tabs(request, course_module):
         """
         tab_panel = {
             "type": tab_type.name,
-            "name": tab_type.title,
         }
         has_tab = tab_panel in tabs
         if tab_enabled and not has_tab: