Add option to use flex grid for uneven numbers of items
>>> [!note] Migrated issue
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<!-- Migrated from issue #3589615. -->
Reported by: [pameeela](https://www.drupal.org/user/1431110)
Related to !1
>>>
<p>Add the ability to center uneven items in a row like:</p>
<p><img src="https://www.drupal.org/files/issues/2026-05-13/Screenshot%202026-05-13%20at%204.02.27%E2%80%AFpm.png" alt=""></p>
issue