MDL-49845 core_user: Fix behat failures

user/tests/behat/user_grade_navigation.feature

@@ -81,7 +81,7 @@ Feature: The student can navigate to their grades page and user grade report.
     And I click on "Create this role" "button"
     And I navigate to "Browse list of users" node in "Site administration > Users > Accounts"
     And I follow "Student 1"
-    And I follow "Student 1's preferences"
+    And I click on "Preferences" "link" in the ".profile_tree" "css_element"
     And I follow "Assign roles relative to this user"
     And I follow "Parent"
     And I click on "//select[@id='addselect']/descendant::option[contains(., 'Parent 1 ([email protected])')]" "xpath_element"