Users: Ensure that users with no role on a site are taken into consideration when listing users on Multisite.

This ensures that users who are a member of a site but have no role are correctly listed on the Users screen and can be filtered from the 'None' role filter.

Props tobi823, flixos90, scottlee

Fixes #36196


git-svn-id: https://develop.svn.wordpress.org/trunk@41138 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/user/countUsers.php

@@ -52,6 +52,7 @@ class Tests_User_CountUsers extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 22993
+	 * @ticket 36196
 	 * @group multisite
 	 * @group ms-required
 	 *
@@ -103,7 +104,7 @@ class Tests_User_CountUsers extends WP_UnitTestCase {
 			'author'        => 1,
 			'contributor'   => 1,
 			'subscriber'    => 1,
-			'none'          => 0,
+			'none'          => 2,
 		), $count['avail_roles'] );
 
 		// Test users counts on blog 1