Fix various team accessibility issues.

Authors:
  - Peter Fogg
  - Daniel Friedman

TNL-1953

lms/static/js/spec/components/header/header_spec.js

@@ -13,7 +13,7 @@
 
                    var testBreadcrumbs = function (breadcrumbs) {
                        model.set('breadcrumbs', breadcrumbs);
-                       expect(view.$el.html()).toContain('<nav class="breadcrumbs">');
+                       expect(view.$('nav.breadcrumbs').length).toBe(1);
                        _.each(view.$('.nav-item'), function (el, index) {
                            expect($(el).attr('href')).toEqual(breadcrumbs[index].url);
                            expect($(el).text()).toEqual(breadcrumbs[index].title);

lms/static/js/spec/components/tabbed/tabbed_view_spec.js

@@ -101,7 +101,7 @@
                            view.$('.nav-item[data-index=1]').click();
                            expect(Backbone.history.navigate).toHaveBeenCalledWith(
                                'test 2',
-                               {replace: true, trigger: true}
+                               {replace: true}
                            );
                        });