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Description of problem:
There will be an 'Ooops' when inputting something by 'Ctrl + C' and 'Ctrl + V' to 'Target Path' on 'Storage Pool' creation dialog.

Version-Release number of selected components (if applicable):
cockpit-machines-224.2-1.el8.noarch
libvirt-dbus-1.3.0-2.module+el8.3.0+6423+e4cb6418.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Open the 'Storage Pool' creation dialog
2. Copy a path(such as /home/test) to 'Target Path' by 'Ctrl + C' and 'Ctrl + V'
3. Then input 'Arrow Down' by keyboard

Actual results:
1. After step 2, the drop-down list doesn't show the input option(The path exists on the host)
2. After step 3, there will be an 'Ooops' shown

Expected results: 
1. After step 2, the drop-down list show the input option
2. After step 3, no 'Ooops' shown

Additional info:
Error message from browser  console:
machines.js:114 Uncaught TypeError: Cannot read property 'classList' of null
    at handleTypeaheadKeys (machines.js:114)
    at onKeyDown (machines.js:114)
    at Object.s (machines.js:98)
    at f (machines.js:98)
    at machines.js:98
    at v (machines.js:98)
    at at (machines.js:98)
    at it (machines.js:98)
    at st (machines.js:98)
    at ft (machines.js:98)

PR sent upstream but it's blocked on some patternfly-react open patches. https://github.com/cockpit-project/cockpit/pull/15219

Fixed with:

commit 7d44ac7b93223bcd86ea748ec548948fc0f397f7
Author: Katerina Koukiou <kkoukiou>
Date:   Tue Feb 2 11:21:06 2021 +0100

    lib: improve our custom FileAutocomplete component

Test Versions:
cockpit-machines-237-1.el8.noarch
cockpit-236-1.el8.x86_64
libvirt-dbus-1.3.0-2.module+el8.3.0+6423+e4cb6418.x86_64


Test Steps:
1. Open the 'Storage Pool' creation dialog
2. Copy a path(such as /home/test) to 'Target Path' by 'Ctrl + C' and 'Ctrl + V'
3. Then input 'Arrow Down' by keyboard

Test Results:
1. After step 2, the drop-down list show the input option
2. After step 3, no 'Ooops' shown.

According to the results, move the status to VERIFIED.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (cockpit-appstream bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:1875