Controls: Remove preventDefault() from mouse handlers.

[Mugen87]

Related issue: #21889

Description

This PR removes all calls of preventDefault() in mouse handlers from all controls classes to avoid side-effects mentioned in #21889. During my local testing with the examples I was not able to spot a different behavior.

[mrdoob]

Thanks!

[puxiao]

Are you sure you want to do this?
I think it's too radical and crazy.
Why not add a new attribute to control whether to cancel?

class OrbitControls extends EventDispatcher {

	constructor( object, domElement ) {
	
+		this.preventDefault = true;
	
		function onMouseDown( event ) {
-			event.preventDefault();
		
+			if( this.preventDefault ) {
+				event.preventDefault();
+			}
		}
	}
}

[Mugen87]

Why is this change radical and crazy? Do you mind explaining your concerns in more detail?

[puxiao]

If the <canvas /> is full of document.body, everything is fine.
However, if the <canvas /> is only a part of the document.body, there will be various mouse effects on the current page.

Isn't this the meaning of adding preventDefault() before?

[Mugen87]

Well, according to a lot of user feedback the new behavior is the more expected one. I also think that it was a mistake to add event.preventDefault(); in the first place. TransformControls does not use it either and the class works just fine.

[Mugen87]

I'll add a note in the migration guide. Just to be on the safe side.