Updated Call Event handling/display for all decoders and updated channel display values for all decoders.

- Call events now show start-stop timestamps.  (or START-In Progress if call is ongoing )
 - Call start/stop events are now on the same event line.
 - Channel panels now display site and/or channel info
 - LTR call events are limited to CALLs on the current LCN, in order to cut down on false call events resulting from noise.
 - Passport display channels now show site/channel.
 - Changed default window used by the DFTProcessor to Cosine, which doesn't have as much FFT bin leakage.

src/decode/passport/PassportCallEvent.java

@@ -26,6 +26,7 @@ public class PassportCallEvent extends CallEvent
 {
 	private int mChannel;
 	private long mFrequency;
+	private int mValidCallMessages = 1;
 	
 	public PassportCallEvent( CallEventType callEventType, 
 							 AliasList aliasList,
@@ -42,6 +43,29 @@ public class PassportCallEvent extends CallEvent
 	    mFrequency = frequency;
     }
 	
+	public boolean addMessage( PassportMessage message )
+	{
+		String tg = message.getToID();
+		
+		if( tg.contentEquals( getToID() ) )
+		{
+			mValidCallMessages++;
+			return true;
+		}
+		
+		return false;
+	}
+	
+	public boolean isValid()
+	{
+		if( getCallEventType() == CallEventType.CALL )
+		{
+			return mValidCallMessages > 1;
+		}
+		
+		return true;
+	}
+	
 	private Alias getAlias( String talkgroup )
 	{
 		if( hasAliasList() )