fix(accessibility): burger menu should be scrollable on tiny screens

src/app/header/header.component.scss

@@ -114,6 +114,8 @@ a {
   background-color: $modal-background;
 
   .menuContent {
+    overflow-y: scroll;
+    max-width: 80vw;
     .title {
       margin-bottom: 35px;
       display: flex;