v2018-09-17.0

• Revert "Revert "remove production dependency on internal metrics database""
• Update AWS Firehose gem to 1.6
• Add helper libraries to App Lab
• Auto-quote dropdown options for string inputs
• Clarify Release Records Procedure
• Move failed account takeover logging to redshift, include error
• Render markdown with remark behind experiment flag
• I18n sync HOC In & Up 09/11
• i18n sync hourofcode.com down and out 09/11 - Spanish Only
• Projects: project validators see view more links
• Track sign up details
• Congrats: show special link for Minecraft in Korean
• Move helper library load to StudioApp
• Gamelab: enable custom marshaling of SpriteSheet
• Delete Account Dialog - Replace strings with markdown
• Wait for "no projects" message to show up in project page eyes test
• Format response from Microsoft into expected auth.info format
• Pegasus: remove uk-quotes gsheet link & results
• Update Joining Text for Email Logins
• wait for scripts to load before requesting text responses
• PR 24815
• Rp redshift updates
• Clever import routes are unauthorized if not signed in
• Reimplement google classroom silent takeover
• preserve submission timestamp when updating assessment lock state
• DTS (Levelbuilder > Staging) [robo-dts]
• Made never autoplay video option available to all curriculum
• Revert "wait for scripts to load before requesting text responses"
• skip lockable stages when numbering stages in SectionProgress
• WebLab calls fail fast when filename is too long
• Remove teachercon references from teacher 19-20 applications, add con…
• Revert "remove production dependency on internal metrics database"
• remove production dependency on internal metrics database
• PR 24789