Fixes

• Duplicated translation files https://github.com/Attendize/Attendize/issues/594
• Sending messages from orders page is broken https://github.com/Attendize/Attendize/issues/955
• Add request throttling to auth routes
• Change the Publish event from a link to a form and button using POST so the request can be validated

Additions

• Improve German translations https://github.com/Attendize/Attendize/pull/986 and https://github.com/Attendize/Attendize/pull/985
• Add SECURITY.md

Deprecations

• Remove Google+ https://github.com/Attendize/Attendize/pull/970