Neos-ui: Fix border-radius for Chrome 62 on MacOS

[johannessteu]

Chrome 62 on MacOS will render some elements like buttons with a default border-radius wich affects our UI. Therefore we need to set a default border-radius:none in our css

Google-Changelog:
https://www.chromestatus.com/features/5743649186906112

[Bobeta]

I'll help you with this 👍

[dimaip]

Thanks @Bobeta! Might make sense to check if newer version of normalize.css would fix it: https://github.com/neos/neos-ui/blob/master/packages/neos-ui/src/styleHostOnly.css#L1

[Bobeta]

@dimaip An issue exists, but no update has been made on Normalize since the release of v7 in may

[mstruebing]

This can be closed, already fixed.