Add a way to do deep styling.

[JSideris]

Sometimes a component is simply a wrapper. There should be a built-in way to bypass the scoping so that we can style child components.

[JSideris]

In v6 this is now more difficult because of the addition of the shadow dom. There may be some options available in pure CSS.

[JSideris]

Consider adding some logic to the style builder functions which will then switch to a deep mode and inject data into the target components.