reinstate the skip_tools() check

We know the defaults can change what tools should be installed, same as saving multisite settings. There could be other things we're not aware of, and the unit tests don't work without skip_tools() running within install_tools(), so we'll put it back.

classes/class-local.php

@@ -316,6 +316,10 @@ public function check_permissions( $file, $minimum ) {
 	public function install_tools() {
 		$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
 		$this->debug_message( 'Checking/Installing tools in ' . $this->content_dir );
+		// If anything changed, we need to re-init the tools list. For instance, setting defaults
+		// and saving network settings, both of those change what tools should be installed.
+		// There may arise other circumstances that have similar impact, so better to be safe.
+		$this->skip_tools();
 		$toolfail = false;
 		if ( $this->function_exists( '\php_uname' ) ) {
 			$arch_type = \php_uname( 'm' );

classes/class-plugin.php

@@ -868,8 +868,6 @@ public function set_defaults() {
 		\add_site_option( 'exactdn_sub_folder', false );
 		\add_site_option( 'exactdn_prevent_db_queries', true );
 		\add_site_option( 'ewww_image_optimizer_ll_autoscale', true );
-		// If anything changed, need to re-init the tools list.
-		$this->local->skip_tools();
 	}
 
 	/**

common.php

@@ -707,7 +707,6 @@ function ewww_image_optimizer_save_network_settings() {
 			update_site_option( 'ewww_image_optimizer_enable_help', $ewww_image_optimizer_enable_help );
 			$ewww_image_optimizer_allow_tracking = empty( $_POST['ewww_image_optimizer_allow_tracking'] ) ? false : ewwwio()->tracking->check_for_settings_optin( (bool) $_POST['ewww_image_optimizer_allow_tracking'] );
 			update_site_option( 'ewww_image_optimizer_allow_tracking', $ewww_image_optimizer_allow_tracking );
-			ewwwio()->local->skip_tools();
 			add_action( 'network_admin_notices', 'ewww_image_optimizer_network_settings_saved' );
 			add_settings_error( 'general', 'settings_updated', __( 'Settings saved.' ), 'success' ); // phpcs:ignore WordPress.WP.I18n.MissingArgDomain
 		} elseif (