Changed invisible-button class to transparent-button

Frontend/assets/css/tools/mock/r11tool.css

@@ -187,7 +187,7 @@ body {
     font-size: 20px;
 }
 
-.invisible-button {
+.transparent-button {
     background-color: #00000000;
     border: #00000000;
 }

Frontend/assets/scripts/tools/mock/datatransfer.js

@@ -152,9 +152,7 @@ function loadFetchedMessage(){
 }
 
 function fillStaticFields(uuid, contentType, body, httpStatus){
-    const copyButton = '<button id="btn-copy" class="invisible-button">Copy</button>';
     let link = createLink(uuid);
-    let linkHtml = '<a class="hyperlink" target="_blank" href="'+link+'">'+link+'</a>' + copyButton;
     $('#messageLink').attr("href", link);
     $('#messageLink').html(link);
     $('#httpStatus').val(httpStatus);