Prep Plugin for release on WordPress.org

Escape everything that should be escaped.
Add nonce checks where needed.
Sanitize all inputs.
Apply Code style changes across the codebase.
Correct many deprecation notices.
Optimize load order of many filters.

views/events/widget-message.php

@@ -9,10 +9,10 @@
 
 	<li class="wu-p-4 wu-m-0 wu-border-t wu-border-l-0 wu-border-r-0 wu-border-b-0 wu-border-gray-400 wu-border-solid">
 
-	<h3 class="wu-my-1 wu-text-2xs wu-uppercase"><?php echo __('Message', 'wp-multisite-waas'); ?></h3>
+	<h3 class="wu-my-1 wu-text-2xs wu-uppercase"><?php echo esc_html__('Message', 'wp-multisite-waas'); ?></h3>
 
 	<span class="wu-my-1 wu-inline-block">
-		<?php echo $object->get_message(); ?>
+		<?php echo wp_kses_post($object->get_message()); ?>
 	</span>
 
 	</li>