Add legal notice and gitlab link as button

app/templates/nopaque.html.j2

@@ -173,10 +173,11 @@
             </a>
           </div>
           <div class="col s12 m3 offset-m1">
-            <h5 class="white-text">Links</h5>
+            <h5 class="white-text">Legal Notice</h5>
             <ul>
-              <li><a class="grey-text text-lighten-3" href="#!"><i class="material-icons tiny">feedback</i> Feedback</a></li>
-              <li><a class="grey-text text-lighten-3" href="https://gitlab.ub.uni-bielefeld.de/sfb1288inf/opaque"><i class="material-icons tiny">code</i> GitLab</a></li>
+              <li><a class="grey-text text-lighten-3" href="https://www.uni-bielefeld.de/(en)/impressum/">Legal Notice</a> / <a class="grey-text text-lighten-3">Privacy statement</a></li>
+              <li><a class="grey-text text-lighten-3">Terms of use</a></li>
+              <li></li>
             </ul>
           </div>
         </div>
@@ -184,7 +185,7 @@
       <div class="footer-copyright">
         <div class="container">
           © 2020 Bielefeld University
-          <a class="grey-text text-lighten-4 right" href="#!">Legal notice</a>
+          <a class="btn-small right waves-effect waves-light" href="https://gitlab.ub.uni-bielefeld.de/sfb1288inf/opaque"><img src="{{ url_for('static', filename='images/gitlab-icon-1-color-white-rgb.png') }}" style="float: left; height: 24px; margin-top: 4.2px;">GitLab</a>
         </div>
       </div>
     </footer>