fixed bugs happening when EMTPY_DAYS was disabled

Backend/models/workDay.go

@@ -127,7 +127,7 @@ func (d *WorkDay) GetWorkDays(card_uid string, tsFrom, tsTo time.Time) []WorkDay
 		} else {
 			workDay.calcPauseTime()
 		}
-		if emptyDays || workDay.Bookings[0].CounterId != 0 {
+		if emptyDays || len(workDay.Bookings) > 0 || (workDay.Absence != Absence{}) {
 			workDays = append(workDays, workDay)
 		} else {
 			log.Println("no booking on day", workDay.Day.Format("02.01.2006"))