refactored translations, preparing sending of document

frontend/src/Components/ContactSelector.svelte

@@ -2,7 +2,7 @@
     import {onMount} from 'svelte';
     import {t} from '../translations.svelte.js';
     let { caption, onselect = (contact) => console.log('selected '+contact.FN||contact.ORG) } = $props();
-    let message = t('contacts.loading');
+    let message = t('loading');
     let contacts = $state(null);
     let value = 0;