Fix crash when showing hidden systems - ensure cursystem is populated.
Fix crash when showing hidden systems - ensure cursystem is populated.

When selecting hidden system , call updatesys so the array has the
cursystem object set.

andreaspada/EDDiscovery,klightspeed/EDDiscovery,EDDiscovery/EDDiscovery,EDDiscovery/EDDiscovery,klightspeed/EDDiscovery,andreaspada/EDDiscovery,EDDiscovery/EDDiscovery,klightspeed/EDDiscovery