* views: Adjust heading positions

* Adjust settings pages

Adjust label. Adjust tables. Adjust admin/reports/* pages. Fix 2FA QR code style for narrow devices. Widen several pages. Increase contrast.

* Remove trailing whitespace

* Fix autocomplete in two_factor.html.haml

* Fix autocomplete in registrations edit.html.haml

* Fix autocomplete in passwords edit.html.haml

* Fix autocomplete in _registration.html.haml

* Fix autocomplete in new.html.haml

* Fix autocomplete in show.html.haml

* Add autocomplete option to sessions new.html.haml

* Add autocomplete option to 2FA new.html.haml

* Add autocomplete option to 2FA show.html.haml

* Add overview of active sessions

* Better display of browser/platform name

* Improve how browser information is stored and displayed for sessions overview

* Fix test

* Add form for account deletion

* If avatar or header are gone from source, remove them

* Add option to have SuspendAccountService remove user record, add tests

* Exclude suspended accounts from search

* add haml_lint to Gemfile

* add .haml-lint.yml

* fix warnings of haml_lint