Fix TypeError when converting back to password

After the password input has been converted to text, there is no
input matching type=password. However, the JS assumed there is which
resuled in a TypeError due to a null result when it looked for the
input. This fixes the problem by selecting by class instead.

Author: dan-jensen

js/show-password-toggle.js

@@ -1,10 +1,9 @@
 var ShowPasswordToggle = document.querySelector("[type='password']");
+ShowPasswordToggle.classList.add("input-password");
+document.getElementById("toggle-password").classList.remove("d-none");
 ShowPasswordToggle.onclick = function () {
-  document.querySelector("[type='password']").classList.add("input-password");
-  document.getElementById("toggle-password").classList.remove("d-none");
-
-  const passwordInput = document.querySelector("[type='password']");
-  const togglePasswordButton = document.getElementById("toggle-password");
+  var passwordInput = document.querySelector(".input-password");
+  var togglePasswordButton = document.getElementById("toggle-password");
 
   togglePasswordButton.addEventListener("click", togglePassword);
   function togglePassword() {