Better font-smoothing

Font-smoothing now includes Firefox Mac property, and can be reset for components similarly to box-sizing.
To have less specificity just set it on html, then inherit on `*`. Otherwise a component changing the default would get overridden on input, buttons etc.

Also seems `:before, :after` don't apply font smoothing.

```css
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  -moz-osx-font-smoothing: inherit;
  -webkit-font-smoothing: inherit;
}
```