remove hidden comments plan
quest/add view: remove unused backdrop styling
upgrade bootbox to 4.0.0

4.0.0 supports Bootstrap 3, so "Cancel" button how have btn-default
class, as it should.
quest/add view: don't refetch realms on render, only on initialize
textarea.setRealm passes realm to markdown preview
quest/add: call initRealm() only once, on @activate()
update jquery.autosize to 1.17.8
initial "Clone" button - copy all quest parameters to /quest/add form
icon-copy for Clone button
unify Leave and Abandon buttons in a single Drop out button

which prompts for clarification through additional modal window
tooltips for Drop out and Clone buttons
db->quests->add supports cloned_from param
pass "cloned_from" in POST /api/quest
track "cloned_from" on cloning, show "quest cloned as" comment
secret and clone comments in /api/event/atom
clone and secret comments in frontend event view
"Cloned from" note in quest/big and quest/feed
fix jquery.autosize path in test/spec.js
sage clone comments
events2email pumper emails on clone comments