Components are always invisible when hidden property is used

[tomivirkki]

Components can't be hidden with the hidden property because when the value changes to false, the attribute isn't removed but hidden="false" attribute gets added instead and the component stays hidden.

Steps to reproduce:

1. Create a new Hilla React project with npx @hilla/cli init --react my-hilla-app
2. In HelloReactView.tsx, add hidden={!name} to the <Button>
3. Type into the field -> the button stays hidden

As a workaround, you need to wrap the component inside another element and add the hidden={!name} to it instead.