Merge pull request #895 from codecombat/master

Merge master into production
Merge branch 'master' into production
Merge branch 'master' into production
Merge branch 'master' into production
Merge pull request #918 from codecombat/master

Merge master into production
Merge pull request #919 from codecombat/master

Potential popup blocker fix
Merge pull request #920 from codecombat/master

Merge master into production
Merge branch 'master' into production
Merge branch 'master' into production
First steps towards hover debugger improvements
Merge branch 'master' into production
Merge pull request #936 from codecombat/master

Master into production
Merge pull request #937 from codecombat/master

Master into production
Merge branch 'master' into production
Fixed various bugs with debug worker
Progress on thang property serialization

There is a bug where thang properties aren’t updated when simulating
forward
Merge pull request #943 from codecombat/master

Master into production
Merge pull request #944 from codecombat/master

Scroll to candidate position while going back
Merge pull request #945 from codecombat/master

Implemented save notes button
Merge branch 'master' into production