Feature/625 readd language selection (#630)

* Bring back language level svgs

* implement correct language level indicators and add tooltip for language cert if needed

* fix padding of language display

* Create working form fields to edit languages in person edit view

* Add language selection squares, but they do nothing yet

* Add hidden _destroy field to person language form

* make selection of languages possible by creating a stimulus controller that handles the visibility

* Make person role helper dynamic to use it for every dynamic form, rename partials, remove the language selection and make creation & deletion of languages possible

* remove now unused stimulus controller

* Make form automatically add mandatory languages unless they already exist, make mandatory langues undeletable

* Refactor code in view and validate language level in controller

* make form submit disabled fields

* Remove unnecessary helper method and dublicate line in form that is not wanted anymore

* Remove unnecessary helper method

* Add classes to form for testing and expand people feature specs to now also test language selection

* Fix update controller method, write test to test all functions of said controller method

* Make edit view wider on small screens

* Resolve rubocop offense

* restyle languages on show view of people

* Make form disable already selected languages

* add a bit of styling to language display

* Make fields deactivate when new fields are added and reactivated when they are deleted

* Make language level selection and certificate input appear on the same height add new method to sort languages

* Remove unused css classes

* Refactor sort_languages method and use it in view

* Add - as default option to language selection and sort languages in edit view

* Make default option not deactivate

* Fix deactivating of languages that are already selected when form fails

* Make view not display certificate if it is blank

* Write test that tests if already selected languages are disabled in other dropdowns

* Restly show and edit view of person a bit

* Rewrite test that tests disabling of languages

* bring back css class that shouldnt have been deleted

* Fix competence feature specs by formatting fixtures correctly and normalizing in tests

* Fix cv_spec spec

* Fix rubocop offenses

* Move logic from controller to concerns

* Remove unnecessary concern

* Outsource language skills levels to a helper method

* Correct rubocop offense

* Remove default option from language select and make it choose first undisabled option when creating a new language

* Adjust code comment to match what is actually done in lang selection js controller