Fix: Email is Case-Sensitive

Created by: Tirokk

Authored by roschaefer Nov 5, 2019 Merged Nov 7, 2019

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🍰 Pullrequest

This was much more difficult than expected because of all those places where we use emails.

Issues

• fix #2057 (closed)

Todo

• Use backend server response for submit messages (it's kind of done, one of the graphql mutation is not responding with the created object)