v2017-09-08.0

• [ci skip] new hidden column for sections table
• I18n sync Down & Out 09/07
• Section flow table sorting
• DTS (Levelbuilder > Staging) [robo-dts]
• Fix flaky section signin test
• Allow students under age 13 to view applab and gamelab projects
• hidden-scripts no longer behind experiment
• Add stage_extras_available prop to script
• Add stage_extras_available prop to script
• Change Bonus Levels heading font to match Project Widget heading
• Revert "Revert "Fix Karel thumbnails in stage extras""
• Load Craft assets from yarn package
• Remove old Craft engine code (game engine is now imported via yarn)
• remove some unused dynamodb configuration parameters
• Remove sql tables and properties helpers, and drop unused tables
• CircleCI 2 fix: move fake SQS service localhost -> 127.0.0.1
• Census map: map height shouldn't exceed 65% of screen height
• update blockly to 1.6.25
• Show stage extras to teacher if enabled for any section
• React: Remove uses of React.createClass in applab/designElements/*
• Revert "Fix Karel thumbnails in stage extras"
• index Pd:Enrollment on user_id
• PR 17598
• I18n sync In & Up 09/07
• React: Remove uses of React.createClass in applab/*
• Add a Finish button to Collector
• Hide bonus level progress in teacher progress view
• Redirect to stage extras page instead of showing the dialog
• Teacher homepage: optional override of teacher announcement
• Fix Karel thumbnails in stage extras
• fix typo in HOC date