Dashboard can not show charts previously saved positions.

[Yuanmu93]

Make sure these boxes are checked before submitting your issue - thank you!

• I have checked the superset logs for python stacktraces and included it here as text if any
• I have reproduced the issue with at least the latest released version of superset
• I have checked the issue tracker for the same issue and I haven't found one similar

Superset version

0.26.3

Expected results

The dashboard load previously saved positions, when i saved dashboard that all the charts can be persist.

Actual results

When I edit dashboard and saved it, the charts no have show I previously saved positions when I refresh page.

Steps to reproduce

Create a dashboard and edit it, then, I saved it, but the charts positions has changed when I refresh the page or next time check the dashboards.

[yamyamyuo]

I have also found this issue as well. This is the issue to blame #4596.
Since I found this issue in production, I have to use yarn install the correct react-grid-layout, and use npm to compile the frontend in my production environment.

[mistercrunch]

That's an issue with react-grid-layout, which we're moving away from. It'll be all resolved in 0.28.x