Adjust prop naming conventions and defaults for easier use with JSX

[j-f1]

I’ve noticed that many if not most boolean props in this library default to true. For example, in <Box />, all of the props except padded default to true. This makes it more difficult to adjust their values. For example, to render a horizontal, invisible box, you need to do this:

<Box vertical={false} visible={false} />

However, if the API was changed to use false props by default, this could be written this way instead:

<Box hidden horizontal />

This saves on typing (no ={false}) and is clearer IMO since you specify which features to enable, instead of which ones to disable.

What do you think?

[kusti8]

Seems like a good idea, but to change the name, I have to create an object mapping to translate it into libui terminology which I would rather not do since it can get really unwieldy.