Inline controls for docs

Summary:
Adding inline controls in markdown using:
```
<controls prop="flexWrap"></controls>
```

Reviewed By: emilsjolander

Differential Revision: D6987150

fbshipit-source-id: 28def12df702ba5d5d5b6a83dd1cb907716d1b1c

website/gatsby-node.js

@@ -25,7 +25,6 @@ exports.createPages = ({boundActionCreators, graphql}) => {
             frontmatter {
               path
               hasPlayground
-              editableProperties
             }
             html
           }