Added WP Active Plugins In System Status

Although there is list of plugins which were installed but will be informative if number of plugins is displayed before getting list. This will count and display the number of plugin installed and used in the environment section.

includes/admin/views/html-admin-page-status-report.php

@@ -69,6 +69,10 @@ if ( ! defined( 'ABSPATH' ) ) {
 				?>
 			</td>
 		</tr>
+		<tr>
+			<td><?php _e( 'WP Active Plugins', 'woocommerce' ); ?>:</td>
+			<td><?php echo count( (array) get_option( 'active_plugins' ) ); ?></td>
+		</tr>
 		<tr>
 			<td><?php _e( 'WP Memory Limit','woocommerce' ); ?>:</td>
 			<td><?php