Fixing bug with wrong link display

- When you selected a course, generated a link and then de-selected the link, the old middleware has still been displayed

scripts.js

@@ -25,6 +25,10 @@ function copyToClipboard(text) {
 }
 
 function generateLink() {
+    // Clear paragraph
+    $('#full-link').text('');
+
+
     let selectedCourseFromPicker = $('#coursename').val().toString();
 
     let raplaUser = '';