Expand CurrentKit:* also in local kit expanders

This provides the same global fall back as the global expander
without relying on the currentKit() discovery process there.

Change-Id: I6f62e58c086ad45fa76acfdf5e0a273ff3fa86e9
Task-number: QTCREATORBUG-13231
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>
Reviewed-by: Robert Loehning <robert.loehning@digia.com>