Missing padding in Views Add button popup's notice message

Problem/Motivation

When adding new field in view, the notification message misses left-padding

Steps to reproduce:

1. Set Claro as default admin theme
2. Add a new view. Choose display Fields
3. Add a new field - a new notice message added in the popup "Selected: field name"

This also happens when hit "Add" buttons in any categories of the Views form, and ticking any checkbox on the pop-up.
Tested on both Drupal 8.8.2 and 8.9, Chrome, Firefox and IE on Windows.

Proposed resolution

Add left padding to the left of the notice message

Remaining tasks

Needs review, and align with the related issues #3066006

User interface changes

Yes. Minor interface changes - Add padding to notice as screenshot below

API changes

NA