Upgrade MathJax to 2.7.

cms/static/cms/js/require-config.js

@@ -95,7 +95,7 @@
             // end of Annotation tool files
 
             // externally hosted files
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
             'youtube': [
                 // youtube URL does not end in '.js'. We add '?noext' to the path so
                 // that require.js adds the '.js' to the query component of the URL,

cms/static/cms/js/spec/main.js

@@ -56,7 +56,7 @@
             'domReady': 'xmodule_js/common_static/js/vendor/domReady',
             'URI': 'xmodule_js/common_static/js/vendor/URI.min',
             'mock-ajax': 'xmodule_js/common_static/js/vendor/mock-ajax',
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
             'youtube': '//www.youtube.com/player_api?noext',
             'coffee/src/ajax_prefix': 'xmodule_js/common_static/coffee/src/ajax_prefix',
             'js/spec/test_utils': 'js/spec/test_utils'

cms/static/cms/js/spec/main_squire.js

@@ -48,7 +48,7 @@
             'draggabilly': 'xmodule_js/common_static/js/vendor/draggabilly',
             'domReady': 'xmodule_js/common_static/js/vendor/domReady',
             'URI': 'xmodule_js/common_static/js/vendor/URI.min',
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
             'youtube': '//www.youtube.com/player_api?noext',
             'coffee/src/ajax_prefix': 'xmodule_js/common_static/coffee/src/ajax_prefix'
         },

common/static/common/js/discussion/mathjax_include.js

@@ -42,6 +42,6 @@ if (typeof MathJax === 'undefined') {
             });
         };
     };
-    vendorScript.src = 'https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG';
+    vendorScript.src = 'https://cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG';
     document.body.appendChild(vendorScript);
 }

common/templates/mathjax_include.html

@@ -76,4 +76,4 @@
 <!-- This must appear after all mathjax-config blocks, so it is after the imports from the other templates.
      It can't be run through static.url because MathJax uses crazy url introspection to do lazy loading of
      MathJax extension libraries -->
-<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG"></script>
+<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG"></script>

common/test/acceptance/pages/lms/teams.py

@@ -502,6 +502,10 @@ class TeamPage(CoursePage, PaginatedUIMixin, BreadcrumbsMixin):
 
     def click_leave_team_link(self, remaining_members=0, cancel=False):
         """ Click on Leave Team link"""
+        self.wait_for(
+            lambda: self.team_leave_link_present,
+            description="Leave Team button did not become present"
+        )
         self.q(css='.leave-team-link').first.click()
         confirm_prompt(self, cancel, require_notification=False)
 

lms/static/lms/js/spec/main.js

@@ -51,7 +51,7 @@
             'squire': 'xmodule_js/common_static/js/vendor/Squire',
             'jasmine-imagediff': 'xmodule_js/common_static/js/vendor/jasmine-imagediff',
             'domReady': 'xmodule_js/common_static/js/vendor/domReady',
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
             'youtube': '//www.youtube.com/player_api?noext',
             'coffee/src/ajax_prefix': 'xmodule_js/common_static/coffee/src/ajax_prefix',
             'coffee/src/instructor_dashboard/student_admin': 'coffee/src/instructor_dashboard/student_admin',