Navigation when using Importers

[jane]

Somehow when the importers got turned into plugins, they lose their navigation designations. When someone is using an importer, it should show Tools -> Import as the active area.

[markjaquith]

Screenshot? I tried both WordPress and Blogger, and they both showed Tools > Import as the active area.

[nacin]

In the admin.php import handler:

	$parent_file = 'tools.php';
	$submenu_file = 'import.php';