* replace ember-cp-validations with custom validation logic for poll creation
* refactor poll participation to not use ember-cp-validations
* drop ember-cp-validations from create.settings route
* remove unused leftovers from ember-cp-validations
* fix potential leak
* assertion thrown in CI tests (Firefox) indicate that listener is cleaned up automatically
* synchronize translations
This also fix a bug if user creates more than one croodle without reloading window
in between. In that case a data fragment is reused which throws.
It's also the first step in dropping {{simple-select}} which is very outdated.
