Radio buttons need border-radius override

[chrisvanpatten]

Since #8385 we provide an updated generic style for inputs with a default 4px border-radius. However because of the order of CSS loading, this default border-radius override's core's 50% border-radius definition for radio buttons (which renders them round).

To Reproduce
Steps to reproduce the behavior:

1. Open a block with a <RadioControl />
2. See it's not round

Expected behavior
Good: 🔘
Bad: ⏺

Screenshots

[karmatosed]

As this is a matter of sorting loading, there wouldn't be any design change. Making that assumption lets remove design feedback just for now, happy to add back if we do want to discuss.

[chrisvanpatten]

@karmatosed I don’t think any design feedback is needed either. There is also a pending PR at #8835 that is just waiting for Travis to get fixed up.