[wp-trac] [WordPress Trac] #36911: Customizer and Theme Installer spinners should have different z-index

[WordPress Trac]

#36911: Customizer and Theme Installer spinners should have different z-index
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 Reporter:  afercia       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Customize     |     Version:  4.5
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:  ui
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Comment (by afercia):

 Opacity (on the iframe) and transform (on the spinner) can create
 [https://developer.mozilla.org/en-
 US/docs/Web/CSS/CSS_Positioning/Understanding_z_index/The_stacking_context
 new stacking contexts] so I'd be inclined to simplify. Don't see a good
 reason for all the `z-index` used here.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36911#comment:1>
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