[wp-meta] [Making WordPress.org] #1199: DevHub: Fix attach/detach ticket flow

[Making WordPress.org]

#1199: DevHub: Fix attach/detach ticket flow
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Reporter:  DrewAPicture  |      Owner:
    Type:  defect        |     Status:  new
Priority:  normal        |  Component:  developer.wordpress.org
Keywords:  has-patch     |
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 At some point, it looks like the attach/detach ticket workflow for editing
 parsed content broke.

 I've updated the AJAX to use `wp.ajax.post()`, updated to the spinner
 toggling to match the new [https://make.wordpress.org/core/2015/04/23
 /spinners-and-dismissible-admin-notices-in-4-2/ WordPress way], and made
 some other minor improvements to the UI.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/1199>
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