Issue #3440228: Add extra padding below grandchild menu items

Closes #3440228

changed title from Add extra padding below grandchild menu items to Issue #3440228: Add extra padding below grandchild menu items

We've defined default spaces on the design system that should be used. This should be --admin-toolbar-space-12. See its definition in https://git.drupalcode.org/project/navigation/-/blob/1.x/css/base/variables.pcss.css?ref_type=heads#L76

changed this line in version 2 of the diff

added 4 commits

• 833efa0a...3b1f7568 - 2 commits from branch project:1.x
• 5276bc8a - Add extra padding below grandchild menu items
• 1f241682 - Use variable for extra padding value

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started a merge train

merged