DT: open to last-viewed chapter (#788)
DT: open to last-viewed chapter (#788)

* DT: open to last-viewed chapter

* DT: open to last-viewed chapter
javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat