Clear comments before re-adding - probably ought to think of a better way to do this?

fillcomments.js

@@ -36,6 +36,7 @@ function doComments(id,qid) {
 
     const div = document.getElementById(id);
     console.log(div);
+    div.innerHTML = "";
     // Create a new <ul> element
     const ul = document.createElement("ul");