New: Add rel="noreferrer" to all external links

* New: Add rel="noreferrer" to all external links

(cherry picked from commit c722e9112496062313d09df16b169873f910f2a1)

* Update Link.js

Co-authored-by: Mark McDowall <mark@mcdowall.ca>
Co-authored-by: Qstick <qstick@gmail.com>

frontend/src/Components/Link/Link.js

@@ -43,6 +43,7 @@ class Link extends Component {
         el = 'a';
         linkProps.href = to;
         linkProps.target = target || '_blank';
+        linkProps.rel = 'noreferrer';
       } else if (noRouter) {
         el = 'a';
         linkProps.href = to;