GObject automatically notifies when passing
properties as part of g_object_new(). This
happens after the instance is created, thus
after constructed().
By passing G_PARAM_EXPLICIT_NOTIFY, we avoid
this behavior. However, we are still notifying
PROP_CONTEXT in GcalWindow. Removing this other
notify fixes the crashes related to GcalContext.
https://gitlab.gnome.org/GNOME/gnome-calendar/issues/417
This commit brings a few changes that I was too lazy to
split in different commits:
* Remove a few useless arguments in the GcalWeatherService API
* Move the weather management code from GcalWindow to GcalWeatherSettings
* A few style changes