MDL-38622 behat: New tests

Navigation works correctly in paged
mode, according to MDLQA-1633, MDLQA-1639,
MDLQA-1645, MDLQA-1646, MDLQA-1647,
MDLQA-1648, MDLQA-1649, MDLQA-1651,
MDLQA-1652, MDLQA-1653, MDLQA-1654
and MDLQA-1655.