[dnd][explore] Metric filed will shrink when change aggregate function with a changed metric label

[jinghua-qa]

When dnd is turn on, Metric filed will shrink when change aggregate function with a changed metric label, user need refresh page to see metric field again.

Expected results

Metric filed did not shrink

Actual results

Metric filed shrink

Screenshots

Screen.Recording.2021-08-10.at.8.15.03.PM.mov

How to reproduce the bug

Precondition: turn on dnd

1. change metric label to new name (not default)
2. remove aggregate function and add back
3. save and close popover
4. observe metric field and see error

Environment

(please complete the following information):

• superset version: latest master
• python version: python --version
• node.js version: node -v
• any feature flags active:

Checklist

Make sure to follow these steps before submitting your issue - thank you!

• I have checked the superset logs for python stacktraces and included it here as text if there are 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.

Additional context

Add any other context about the problem here.

[jinghua-qa]

@kgabryje