'Copy to Clipboard' functionality (#163)

* Adds 'Copy to Clipboard' functionality to all code blocks in readOnly

* Show on hover, move to SC

* 💚

* PR feedback

frontend/components/Editor/components/InlineCode.js

@@ -0,0 +1,12 @@
+// @flow
+import styled from 'styled-components';
+import { color } from 'styles/constants';
+
+const InlineCode = styled.code`
+  padding: .25em;
+  background: ${color.smoke};
+  border-radius: 4px;
+  border: 1px solid ${color.smokeDark};
+`;
+
+export default InlineCode;