Fix GUI bug in RTKPOST

Fix bug in RTKPOST GUI from last checkin.  The bug could cause incorrect
save and retrieval to the config file for the new varholdamb and
gainholdamb input parameters

app/rtkpost/postopt.cpp

@@ -672,8 +672,8 @@ int ppp=PosMode->ItemIndex>=PMODE_PPP_KINEMA;
 	MaxAgeDiff	 ->Text			=s.sprintf("%.1f",prcopt.maxtdiff );
 	RejectGdop   ->Text			=s.sprintf("%.1f",prcopt.maxgdop  );
 	RejectThres  ->Text			=s.sprintf("%.1f",prcopt.maxinno  );
-	VarHoldAmb   ->Text			=s.sprintf("%.1f",prcopt.varholdamb);
-	GainHoldAmb  ->Text			=s.sprintf("%.1f",prcopt.gainholdamb);
+	VarHoldAmb   ->Text			=s.sprintf("%.5f",prcopt.varholdamb);
+	GainHoldAmb  ->Text			=s.sprintf("%.5f",prcopt.gainholdamb);
 	SlipThres	 ->Text			=s.sprintf("%.3f",prcopt.thresslip);
 	ARIter		 ->Text			=s.sprintf("%d",  prcopt.armaxiter);
 	MinFixSats	 ->Text         =s.sprintf("%d",  prcopt.minfixsats);