MDL-56898 behat: Ensure we have button in viewport and page is stable

admin/tool/behat/tests/behat/manipulate_forms.feature

@@ -15,6 +15,7 @@ Feature: Forms manipulation
     Then the field "First name" matches value "Field value"
     And the "Select a country" select box should contain "Japan"
     And the field "New password" matches value "TestPass"
+    And I take focus off "Update profile" "button"
     And I press "Update profile"
 
   @javascript

auth/tests/behat/behat_auth.php

@@ -61,6 +61,10 @@ class behat_auth extends behat_base {
      * @Given /^I log out$/
      */
     public function i_log_out() {
+
+        // Wait for page to be loaded.
+        $this->wait_for_pending_js();
+
         // Click on logout link in footer, as it's much faster.
         $this->execute('behat_general::i_click_on_in_the', array(get_string('logout'), 'link', '#page-footer', "css_element"));
     }

enrol/tests/behat/behat_enrol.php

@@ -64,6 +64,9 @@ class behat_enrol extends behat_base {
         // Set form fields.
         $this->execute("behat_forms::i_set_the_following_fields_to_these_values", $table);
 
+        // Ensure we get button in focus, before pressing button.
+        $this->execute("behat_general::i_take_focus_off_field", array(get_string('addinstance', 'enrol'), "button"));
+
         // Save changes.
         $this->execute("behat_forms::press_button", get_string('addinstance', 'enrol'));