MaterialWindow has bug in setPaddingLeft() method.

[rmraya]

Hi,

The setPaddingLeft() method in class MaterialWindow from package gwt.material.design.addins.client.window has a bug in line 422:

    @Override
    public void setPaddingLeft(double padding) {
        content.setPaddingTop(padding);
    }

It sets the top padding instead of the left one.

[kevzlou7979]

Thanks will commit the change