Behat test: Verify "Display pages" button displayed to left of the "Return to Pages" button

Behat: Update Script for feature file -> /behat/features/user_content/create_delete_page.feature

Related to: https://bugs.launchpad.net/mahara/+bug/1690267

Summary: Display pages button displayed to left of the Return to Pages and collections when user is on a portfolio page while in edit mode.

1. Add the following lines after user has created a page and is in edit mode
--- # verify display page button is displayed
--- And I should see "Display page" in the "div#view-wizard-controls.col-collapse-offset.col-with-collapse" element
--- # verify Return to pages and collections is displayed
--- And I should see "Return to pages and collections" in the "div#view-wizard-controls.col-collapse-offset.col-with-collapse" element