closes #8304

closes #8037

fixes #8139
closes #8242

This reverts b3ca504c. We don't quite know why that was added, but we assume it's because of format strings. Some pre-2011 users exist that still have dots or dashes in their username, and those accounts are somewhat broken now.

closes #8266

closes #8262

closes #8213
closes #7696

Co-authored-by: Hank Grabowski <hankgrabowski@gmail.com>
Co-authored-by: Thorsten Claus <thorstenclaus@web.de>

closes #8227

closes #8207

closes #8193

closes #8174

YAML is just too easy to get wrong

closes #8132

closes #8063
closes #8061

To avoid an conflict with Rails, and to avoid confusing by twitter's gem overloading the method.

closes #8060

fixes #8023

And remove unused translations and make "another pod" translatable.

closes #7896

Use a partial to share code between mobile and desktop, add the new route to the RegistrationController, drop flash message for closed registrations

fixes #7767

fixes #7910

closes #7966

Using token doesn't make much sense when you can generate new tokens
right below.

closes #8006

They don't make sense on that page, because at this stage, the user
already has an account and also has already entered their password.

closes #8005

fixes #8001

closes #8003

fixes #7997

closes #7998

closes #7926

fixes #7840

closes #7884

fixes #7838

closes #7909

closes #7868

Facebook removed the API and facebook integration is broken now, so lets
remove it.

closes #7874

closes #7833

This is required to make url_for(StatusMessage.new) work

closes #7814