Claro:The cancel button is not center-aligned in the layout builder.

#2 Please review the patch

@Sakthivel M I have applied the patch #2 and tested this issue manually in Claro theme. This is fixed with after this patch. Thanks for the patch.
Adding screenshots for reference. RTBC+1

Verified and tested patch#2 on the drupal 9.3.x-dev version and Claro 9.3.0-dev version. Patch applied successfully and looks good to me.

Testing Steps:

1. Install drupal 9.3.x-dev version.
2. Go to Appearance -> Set Claro theme as admin and default theme
3. Home>Administration>Structure>Content types>Article,under layout options check layout builder.
4. Go to the article node, click on layout.
5. Click on Add block, create a custom block>basic block.
6. Click on -> quick edit -> "Remove Block" option
7. Observe on confirming remove "Cancel" button not displayed center aligned.
8. Now apply the patch and clear the cache.
9. Again Go to the article node, click on layout.
10. Click on Add block, create a custom block>basic block.
11. Click on -> quick edit -> "Remove Block" option
12. Verify "Cancel" option displayed center aligned.

Testing Results:

After applying the patch "Cancel" option displayed center aligned.
Please refer attached Before patch screenshot and After patch screenshot images for reference.

Moving this ticket to RTBC.

Seems unrelated test failure. Moving to RTBC

I think this should be fixed in layout builder and I think we should consider the example set by the confirm form and make the cancel link look like a button.

So with bartik the cancel button is already center aligned. And at least this is only changing the off canvas css so perhaps this is okay. Discussed with @lauriii - both of us feel that it'd be great if themes didn't need to be concerned with stuff like this but the reality is that it's just not possible. I'll commit once the alpha freeze is over.

Committed and pushed f4ff1b59da to 9.4.x and 3d8ead3c02 to 9.3.x. Thanks!

Backported to 9.3.x as Claro is not stable yet but might be in 9.3.0.