[wp-trac] [WordPress Trac] #40478: Missing spinner when installing new language

[WordPress Trac]

#40478: Missing spinner when installing new language
----------------------------+-----------------------------
 Reporter:  afercia         |      Owner:
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Administration  |    Version:  4.2
 Severity:  normal          |   Keywords:  has-screenshots
  Focuses:  ui              |
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 In the General Settings screen, when installing a new language and then
 pressing the "Save Changes" button, a spinner is supposed to appear on the
 right of the button:

 [[Image(https://cldup.com/zMWIz7J1RV.jpeg)]]

 This spinner is injected via JS but stays hidden. Since [31996] toggling
 spinners uses the CSS visibility property instead of display (so that the
 space is always reserved and nothing moves around unexpectedly) but seems
 this spinner was not updated accordingly. It just needs an `is-active` CSS
 class:

 [[Image(https://cldup.com/jaLtHowVxn.jpeg)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/40478>
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