Call super.dispose after doing subclass-specific disposal

[pixelzoom]

For code review #41 ...

super.dispose is typically called after doing any subclass-specific disposal. This sim is doing the opposite.

For example in WaterCup3DNode.ts:

  public override dispose(): void {
    super.dispose();
    this.waterLevelTriangle.dispose();
    this.adapterProperty.dispose();
    this.introModel.isShowingTickMarksProperty.unlink( this.showTickMarksLink );
    this.cup3DModel.resetEmitter.removeAllListeners();
  }

Search for super.dispose, I think the order is reversed everywhere.

[marlitas]

Since moving everything to static allocation, disposal is no longer required for any of the elements in this screen. Closing.