weather-service: split activate/deactivate from start/stop

Splitting an activation flag from starting and stopping
the service makes it possible to flag the service as
wanted from the settings and still due use counting in a
subsequent commit.

Signed-off-by: Markus Göllnitz <camelcasenick@bewares.it>

src/gui/gcal-weather-settings.c

@@ -202,11 +202,11 @@ manage_weather_service (GcalWeatherSettings *self)
         }
 
       gcal_weather_service_set_location (weather_service, location);
-      gcal_weather_service_start (weather_service);
+      gcal_weather_service_activate (weather_service);
     }
   else
     {
-      gcal_weather_service_stop (weather_service);
+      gcal_weather_service_deactivate (weather_service);
     }
 
   GCAL_EXIT;