Administration: Accommodate long translations for "Posts" in list table headers.

This stems from longer translations on the User table, but this will apply to any posts column in a list table. Hyphenation should typically just apply to the column header, as the cell contents are just a count.

This does appear to have some browser inconsistencies, so may need further adjustment in the future.

Props audrasjb, justinahinon.
Fixes #50838.

Built from https://develop.svn.wordpress.org/trunk@49317


git-svn-id: http://core.svn.wordpress.org/trunk@49079 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/list-tables-rtl.css

@@ -314,6 +314,9 @@ table.fixed {
 
 .fixed .column-posts {
 	width: 74px;
+	-webkit-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
 }
 
 .fixed .column-comment .comment-author {

wp-admin/css/list-tables.css

@@ -313,6 +313,9 @@ table.fixed {
 
 .fixed .column-posts {
 	width: 74px;
+	-webkit-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
 }
 
 .fixed .column-comment .comment-author {

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-beta1-49316';
+$wp_version = '5.6-beta1-49317';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.