FEAT #0000 TIME 0:35 add delete all for contacts + add contact in result

.../contact/autocomplete/contact-autocomplete.component.html

.../contact/autocomplete/contact-autocomplete.component.scss

...pp/contact/autocomplete/contact-autocomplete.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts