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
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
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
Merge branch 'master' into production
Merge pull request #968 from codecombat/master

Master into production
Merge pull request #969 from codecombat/master

Master into production