Remove rounding from waypoint timing in the UI.

This is behaving strangely on some machines. Stop hiding the details
in the UI while we debug.

qt_ui/windows/mission/QFlightItem.py

@@ -22,8 +22,7 @@ class QFlightItem(QStandardItem):
             self.setIcon(icon)
         self.setEditable(False)
         estimator = TotEstimator(self.package)
-        delay = datetime.timedelta(
-            seconds=int(estimator.mission_start_time(flight).total_seconds()))
+        delay = estimator.mission_start_time(flight)
         self.setText("["+str(self.flight.flight_type.name[:6])+"] "
                      + str(self.flight.count) + " x " + db.unit_type_name(self.flight.unit_type)
                      + "   in " + str(delay))

qt_ui/windows/mission/flight/settings/QFlightDepartureDisplay.py

@@ -19,8 +19,7 @@ class QFlightDepartureDisplay(QGroupBox):
         layout.addLayout(departure_row)
 
         estimator = TotEstimator(package)
-        delay = datetime.timedelta(
-            seconds=int(estimator.mission_start_time(flight).total_seconds()))
+        delay = estimator.mission_start_time(flight)
 
         departure_row.addWidget(QLabel(
             f"Departing from <b>{flight.from_cp.name}</b>"