Cleanup cloth simulation GUI

[gero3]

The GUI in Simulation / Cloth example can look better.

To Reproduce:

Open Simulation / Cloth example

Issue

The GUI in the example is code-based added.

Solution

Use a cleaner GUI.

[mrdoob]

gui.add( params, 'enableWind' ).name( 'Enable wind' );
gui.add( params, 'showBall' ).name( 'Show ball' );
gui.add( params, 'tooglePins' ).name( 'Toggle pins' );

[mrdoob]

Thanks!