Added copy button to link field (#216)

Co-authored-by: Adam Bem <adam.bem@zoho.eu>
Reviewed-on: #216
Reviewed-by: Mikolaj Widla <widlam@noreply.example.com>

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

@@ -40,6 +40,13 @@ $('#btn-newRow').click(
     }   
     );
 
+$('#btn-copy').click(
+    ()=> {
+        var link = $("#messageLink").html();
+        navigator.clipboard.writeText(link);
+    }   
+    );
+
 /*
     Functions segment
 */
@@ -146,8 +153,8 @@ function loadFetchedMessage(){
 
 function fillStaticFields(uuid, contentType, body, httpStatus){
     let link = createLink(uuid);
-    let linkHtml = '<a class="hyperlink" target="_blank" href="'+link+'">'+link+'</a>';
-    $('#messageLink').html(linkHtml);
+    $('#messageLink').attr("href", link);
+    $('#messageLink').html(link);
     $('#httpStatus').val(httpStatus);
     $('#typeSelector').val(contentType);
     $('#bodyEditor').val(body);