Split SystemClass.ReturnSystemListForAutoComplete
Split SystemClass.ReturnSystemListForAutoComplete

Into two (hopefully) self-explanatory methods:
	* ReturnOnlyGalMapListForAutoComplete
	* ReturnOnlySystemsListForAutoComplete
Original method now combines these two methods into one data set.
Also, inhibit a null reference in all three of these methods.

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