:bug:Fix practice level chrome titles
:bug:Fix practice level chrome titles

We mistakenly added a second computed property.

codecombat/codecombat,javatlacati/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,codecombat/codecombat