Small whitespace cleanup

public/js/app.js

@@ -622,9 +622,7 @@ function initIssue() {
     (function() {
         var $attachedList = $("#attached-list");
         var $addButton    = $("#attachments-button");
-
         var files         = [];
-
         var fileInput     = document.getElementById("attachments-input");
         
         if (fileInput === null) {
@@ -638,7 +636,7 @@ function initIssue() {
             $parent.remove();
         });
         
-        var clickedButton = undefined;
+        var clickedButton;
         
         $('#issue-reply-btn,input[type="submit"]', fileInput.form).on('click', function() {
             clickedButton = this;