Logins JS Cleanup

- Remove old JS
- Standardize generate password JS style to match existing
- Move JS functions to own files

js/logins_generate_password.js

@@ -0,0 +1,14 @@
+function generatePassword(login_id) {
+    // Send a GET request to ajax.php as ajax.php?get_readable_pass=true
+    jQuery.get(
+        "ajax.php", {
+            get_readable_pass: 'true'
+        },
+        function(data) {
+            //If we get a response from post.php, parse it as JSON
+            const password = JSON.parse(data);
+
+            document.getElementById("password").value = password;
+        }
+    );
+}