Restrict textarea fields in network setup to a max width of 100%.

This avoids the content overrunning the screen on mobile devices.

See #32846.

Built from https://develop.svn.wordpress.org/trunk@33171


git-svn-id: http://core.svn.wordpress.org/trunk@33143 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/forms-rtl.css

@@ -869,6 +869,10 @@ table.form-table td .updated p {
   21.0 - Network Admin
 ------------------------------------------------------------------------------*/
 
+.setup-php textarea {
+	max-width: 100%;
+}
+
 .form-field #site-address {
 	max-width: 25em;
 }