Add imprint (VPU/Apps/Signature#7)

packages/app-shell/src/app-shell.js

@@ -471,7 +471,7 @@ export class AppShell extends ScopedElementsMixin(LitElement) {
             footer {
                 display: grid;
                 grid-gap: 1em;
-                grid-template-columns: 1fr max-content max-content;
+                grid-template-columns: 1fr max-content max-content max-content;
             }
 
             footer a {
@@ -712,6 +712,7 @@ export class AppShell extends ScopedElementsMixin(LitElement) {
                 <footer>
                     <div></div>
                     <a target="_blank" rel="noopener" class="int-link-external" href="https://datenschutz.tugraz.at/erklaerung/">${i18n.t('privacy-policy')}</a>
+                    <a target="_blank" rel="noopener" class="int-link-external" href="https://www.tugraz.at/ueber-diese-seite/impressum/">${i18n.t('imprint')}</a>
                     <vpu-build-info class="${prodClassMap}"></vpu-build-info>
                 </footer>
             </div>

packages/app-shell/src/i18n/de/translation.json

@@ -5,6 +5,7 @@
     "word3": "Leidenschaft"
   },
   "privacy-policy": "Datenschutz",
+  "imprint": "Impressum",
   "page-updated-needs-reload": "Die Applikation wurde aktualisiert. Bitte laden Sie die Seite neu.",
   "activity-example": {
     "hello-world": "Hallo Welt"

packages/app-shell/src/i18n/en/translation.json

@@ -5,6 +5,7 @@
     "word3": "Technology"
   },
   "privacy-policy": "Privacy Policy",
+  "imprint": "Imprint",
   "page-updated-needs-reload": "The application has been updated. Please reload the page.",
   "activity-example": {
     "hello-world": "Hello World"