Use noreferrer in addition to noopener for edge case browsers

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/usercontent/index.js

@@ -15,7 +15,7 @@ function remoteRender(event) {
 
     const a = document.createElement("a");
     a.id = "a";
-    a.rel = "noopener";
+    a.rel = "noreferrer noopener";
     a.target = "_blank";
     a.download = data.download;
     a.style = data.style;