Added sceneManager property.

Author: photonstorm

src/loader/LoaderPlugin.js

@@ -100,6 +100,16 @@ var LoaderPlugin = new Class({
          */
         this.textureManager = scene.sys.textures;
 
+        /**
+         * A reference to the global Scene Manager.
+         *
+         * @name Phaser.Loader.LoaderPlugin#sceneManager
+         * @type {Phaser.Scenes.SceneManager}
+         * @protected
+         * @since 3.16.0
+         */
+        this.sceneManager = scene.sys.game.scene;
+
         //  Inject the available filetypes into the Loader
         FileTypesManager.install(this);
 
@@ -1089,6 +1099,7 @@ var LoaderPlugin = new Class({
         this.systems = null;
         this.textureManager = null;
         this.cacheManager = null;
+        this.sceneManager = null;
     }
 
 });