GitLab

- Allow replacement of previously email change requests
- Cleanup expired email change requests in change email view
- Log email change
- Warn user for existing pending requests
- Redirect to profile on change email actions (failed or succeded)

show message when adding new login method to an existing account

if one of auth providers is set to be required, user with no such
provider can only view his profile page and is prompted to add a
new login method.

- Allow replacement of previously email change requests
- Cleanup expired email change requests in change email view
- Log email change
- Warn user for existing pending requests
- Redirect to profile on change email actions (failed or succeded)

show message when adding new login method to an existing account

if one of auth providers is set to be required, user with no such
provider can only view his profile page and is prompted to add a
new login method.

- Allow replacement of previously email change requests
- Cleanup expired email change requests in change email view
- Log email change
- Warn user for existing pending requests
- Redirect to profile on change email actions (failed or succeded)

- Use redirects instead of direct responses
- Messages update

- Redirect to index
- Check for authenticated user

* do not rollback database transaction if notification fails to be sent
* fix typo

- Store additional provider info in PendingThirdPartyUser entries
- Include third party registration logic in main signup view. Additional
  per provider signup views removed.
- Unique email validation for all activation backend forms
- Keep created dates in auth provider and pending user entries
- Other minor fixes