Validation => DONE, Tests => DONE

...app/search/components/criteria/cone-search.component.html

.../search/components/criteria/cone-search.component.spec.ts

src/app/search/components/criteria/cone-search.component.ts

src/app/shared/validator/dec-validator.directive.spec.ts

src/app/shared/validator/dec-validator.directive.ts

src/app/shared/validator/index.ts

src/app/shared/validator/nan-validator.directive.spec.ts

src/app/shared/validator/ra-validator.directive.spec.ts

src/app/shared/validator/ra-validator.directive.ts

src/app/shared/validator/range-validator.directive.spec.ts

src/app/shared/validator/range-validator.directive.ts