[wp-trac] [WordPress Trac] #42205: FTP credentials dialog gets hidden behind things

[WordPress Trac]

#42205: FTP credentials dialog gets hidden behind things
-----------------------------+----------------------------------------
 Reporter:  helen            |      Owner:
     Type:  defect (bug)     |     Status:  new
 Priority:  low              |  Milestone:  Awaiting Review
Component:  Upgrade/Install  |    Version:
 Severity:  normal           |   Keywords:  needs-patch good-first-bug
  Focuses:  ui               |
-----------------------------+----------------------------------------
 Steps to reproduce:

 1. Force FTP on if not already.
 2. Head to `Add Themes` and click on a screenshot for a full screen
 overlay preview.
 3. Click `Install` in the sidebar.
 4. Observe the `Install` button change to `Installing` with a spinner that
 seems to get stuck.
 5. Close the preview overlay and observe that the FTP credentials dialog
 is there waiting patiently.

 This is hopefully "merely" a `z-index` issue. Here's how to force FTP on
 for testing:

 {{{
 <?php
 /**
  * Plugin Name: Force FTP
  * Description: Used to test FTP credentials screen.
  */

 add_filter( 'filesystem_method', function() {
         return 'ftpext';
 } );

 add_filter( 'fs_ftp_connection_types', function() {
         return [
                 'ftp'  => __( 'FTP' ),
                 'ftps' => __( 'FTPS (SSL)' ),
                 'ssh'  => __( 'SSH2' ),
         ];
 } );
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/42205>
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