[dashboard edit mode] The "add components" menu is not displayed if the page was scrolled down before clicking the edit button

[jinghua-qa]

The "add components" menu is not displayed if the page was scrolled down before clicking the edit button.

How to reproduce the bug

1，Go to the "Dashboards" page
2，Click on any example dashboard
3，Scroll the dashboard to the end of the page
4，Click the "Pencil" icon

Expected results

The "add components" menu is displayed even if the page was scrolled down before clicking the edit button.

Actual results

The "add components" menu is not displayed if the page was scrolled down before clicking the edit button, see the video below:

edit.mp4

Screenshots

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Environment

(please complete the following information):

• browser type and version:
• superset version: 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.