admin-ui

Example app: https://pp0o4x40p0.codesandbox.io/#/posts/13

I just copied the last tab a couple of times and you'll see a scrollbar at the bottom.
What I expected: that the Tabs component would be scrollable and the application not to crash.
I think this is because the Tabs parent width is implicit instead of explicit.
![2018-03-22_09-51-42](https://user-images.githubusercontent.com/621098

Hi, thanks for making such an awesome tool. Is it possbile to also add nestjs-query support? I saw there is nest-crud which is great, but IMHO a GraphQL API has many advantages over REST. It would be great if refine can support both nest-crud and nestjs-query.
Many thanks!