Summary Row is not fixed(is scrollable) in version 3.0.0

[serche]

• [x] I have searched this repository's issues and believe that this is not a duplicate.

I'm using ...

• [x] React Grid
• [ ] React Chart
• [ ] React Scheduler

Current Behaviour

Expected Behaviour

Steps to Reproduce

See example from docs: https://codesandbox.io/s/ud9zp

Screenshots

Environment

• devextreme-reactive: 3.0.0
• react: xxx
• browser: xxx
• bootstrap: none
• react-bootstrap: none
• material-ui: none

[chanand]

When is this going to be released?