Editor: Fix selecting/deselecting multiple unwanted categories when clicking on a Category checkbox on the old Edit Post screen.

Rewieved by joemcgill.
Merges [59454] to the 6.7 branch.

Props ffffelix, desrosj, ironprogrammer, neotrope, narenin, zaoyao, im3dabasia1, cbravobernal, azaozz.
Fixes #62504.

git-svn-id: https://develop.svn.wordpress.org/branches/6.7@59468 602fd350-edb4-49c9-b593-d223f7449a82

Author: azaozz

src/js/_enqueues/admin/post.js

@@ -660,7 +660,7 @@ jQuery( function($) {
 			function() {
 				var t = $(this), c = t.is(':checked'), id = t.val();
 				if ( id && t.parents('#taxonomy-'+taxonomy).length ) {
-					$('input[id^="in-' + taxonomy + '-' + id + '"]').prop('checked', c);
+					$('input#in-' + taxonomy + '-' + id + ', input[id^="in-' + taxonomy + '-' + id + '-"]').prop('checked', c);
 					$('input#in-popular-' + taxonomy + '-' + id).prop('checked', c);
 				}
 			}