Migrate frequent item component tests from Karma to Jest
The following frontend tests should be migrated to Jest (&895 (closed)):
$ find spec/javascripts/frequent_items/components
spec/javascripts/frequent_items/components
spec/javascripts/frequent_items/components/app_spec.js
spec/javascripts/frequent_items/components/frequent_items_search_input_spec.js
spec/javascripts/frequent_items/components/frequent_items_list_spec.js
spec/javascripts/frequent_items/components/frequent_items_list_item_spec.js