delete function changed

Hey,

your plugin is really nice but I think, that the delete function is not perfect.
Because every time when we delete a redirection, all positions for all other redirects are set again. With our example we have 3000 redirects and when we not delete a bulk number of redirects is for each delete action 3000 updates.

My new code for the file models/redirect.php => Line: 215

public function delete() {
		global $wpdb;

		$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}redirection_items WHERE id=%d", $this->id ) );

		RE_Log::delete_for_id( $this->id );

		// Reorder all elements (new)
		$wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->prefix}redirection_items SET position = position - 1 WHERE position=%d", (int)$this->position ) );

		Red_Module::flush( $this->group_id );
	}

https://ww.wp.xz.cn/plugins/redirection/