Add APP_NAME constant

Improved issue display
Add component::prepend
Add switches to form html
Updated form html to Bootstrap 5.
Updated navigation html to Bootstrap 5.

config/constants.php

@@ -6,6 +6,9 @@ if ( ! defined( 'HOUDINI_ROOT_DIRECTORY' ) ) {
 if ( ! defined( 'HOUDINI_CONFIG_DIRECTORY' ) ) {
     define( 'HOUDINI_CONFIG_DIRECTORY', HOUDINI_ROOT_DIRECTORY . 'config' . DIRECTORY_SEPARATOR );
 }
+if (!defined('APP_NAME')) {
+    define('APP_NAME', 'Houdini Site');
+}
 // # Tell the app all constants have been loaded.
 if ( ! defined('HOUDINI_CONSTANTS_LOADED' ) ) {
     define( 'HOUDINI_CONSTANTS_LOADED', true );