Fix: Allow empty strings for event settings maps_url (#623)

Author: carlosalaniz

backend/app/Services/Application/Handlers/EventSettings/PartialUpdateEventSettingsHandler.php

@@ -65,7 +65,9 @@ public function handle(PartialUpdateEventSettingsDTO $eventSettingsDTO): EventSe
 
                 'order_timeout_in_minutes' => $eventSettingsDTO->settings['order_timeout_in_minutes'] ?? $existingSettings->getOrderTimeoutInMinutes(),
                 'website_url' => $eventSettingsDTO->settings['website_url'] ?? $existingSettings->getWebsiteUrl(),
-                'maps_url' => $eventSettingsDTO->settings['maps_url'] ?? $existingSettings->getMapsUrl(),
+                'maps_url' => array_key_exists('maps_url', $eventSettingsDTO->settings)
+                    ? $eventSettingsDTO->settings['maps_url']
+                    : $existingSettings->getMapsUrl(),
                 'location_details' => $locationDetails,
                 'is_online_event' => $eventSettingsDTO->settings['is_online_event'] ?? $existingSettings->getIsOnlineEvent(),
                 'online_event_connection_details' => array_key_exists('online_event_connection_details', $eventSettingsDTO->settings)