[wp-trac] [WordPress Trac] #43896: Several flex and grid CSS properties listed as Unknown property in Customizer

[WordPress Trac]

#43896: Several flex and grid CSS properties listed as Unknown property in
Customizer
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 Reporter:  davidjlaietta  |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  Customize      |     Version:  trunk
 Severity:  normal         |  Resolution:
 Keywords:                 |     Focuses:
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Changes (by davidjlaietta):

 * Attachment "Screenshot 2018-04-27 10.49.10.png" added.

 screenshot of Customizer Edit CSS showing the suggestion of an unknown
 property

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Ticket URL: <https://core.trac.wordpress.org/ticket/43896>
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