[wp-trac] [WordPress Trac] #64640: Upgrade screen shows invisible button

[WordPress Trac]

#64640: Upgrade screen shows invisible button
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 Reporter:  fabiankaegy             |      Owner:  (none)
     Type:  defect (bug)            |     Status:  assigned
 Priority:  normal                  |  Milestone:  7.0
Component:  Administration          |    Version:  trunk
 Severity:  normal                  |   Keywords:
  Focuses:  ui, accessibility, css  |
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 After https://core.trac.wordpress.org/changeset/61645 was merged I am
 seeing a defect where the upgrade screen doesn't load the needed admin css
 variables from the base-styles stylesheet which leads to the button
 rendering without any background color and therefore appearing invisible

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Ticket URL: <https://core.trac.wordpress.org/ticket/64640>
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