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

This avoids the content overrunning the screen on mobile devices.

See #32846.


git-svn-id: https://develop.svn.wordpress.org/trunk@33171 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/forms.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;
 }