Help Tab Order should be based on the Priority Argument

[34370] made the order that tabs are returned respect the order they are added, however it broke the respect of priority. By using a ksort instead of a sort, we can restore that default behavior. This adjusts the unit tests so that both order added and priority are tested.

Merges [36089] to the 4.4 branch.
Props meitar, swissspidy, jorbin
Fixes #35215. See #33941.

Built from https://develop.svn.wordpress.org/branches/4.4@36104


git-svn-id: http://core.svn.wordpress.org/branches/4.4@36069 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-screen.php

@@ -530,7 +530,7 @@ final class WP_Screen {
 			}
 		}
 
-		sort( $priorities );
+		ksort( $priorities );
 
 		$sorted = array();
 		foreach ( $priorities as $list ) {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4.1-alpha-36103';
+$wp_version = '4.4.1-alpha-36104';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.