Status messages modal is too big

Problem/Motivation

I created a subtheme with the starterkit. I am working with layouts and every time I make a change that requires attention, a status message pops up which is too big and I can't see what I'm doing, thus, I have to close it every time. I am attaching a screenshot.

Steps to reproduce

1. Enable Layout Builder
2. Either edit the content type or edit nodes of that content type individually.
3. Make any change, add a section, delete a section, add a block, delete a block etc.
4. Observe.

Proposed resolution

Remove the property position: fixed; and the redundant

  bottom: 0;
  left: 0;
  max-height: 75vh;
  z-index: 9999;

from alert.css

Remaining tasks

N/A

User interface changes

N/A

Introduced terminology

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API changes

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Data model changes

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Release notes snippet

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