views/week-view: Replace "context" property with context getter method

Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/702>

src/gui/views/gcal-week-hour-bar.c

@@ -20,6 +20,7 @@
 
 #include "gcal-week-hour-bar.h"
 #include "gcal-week-view-common.h"
+#include "gcal-utils.h"
 
 #include <glib/gi18n.h>
 
@@ -28,8 +29,6 @@ struct _GcalWeekHourBar
   GtkBox              parent_instance;
 
   GtkLabel           *labels[24];
-
-  GcalContext        *context;
 };
 
 G_DEFINE_FINAL_TYPE (GcalWeekHourBar, gcal_week_hour_bar, GTK_TYPE_BOX)
@@ -37,10 +36,11 @@ G_DEFINE_FINAL_TYPE (GcalWeekHourBar, gcal_week_hour_bar, GTK_TYPE_BOX)
 static void
 update_labels (GcalWeekHourBar *self)
 {
+  GcalContext *context = gcal_application_get_context (GCAL_DEFAULT_APPLICATION);
   GcalTimeFormat time_format;
   gint i;
 
-  time_format = gcal_context_get_time_format (self->context);
+  time_format = gcal_context_get_time_format (context);
 
   for (i = 0; i < 24; i++)
     {
@@ -92,6 +92,7 @@ gcal_week_hour_bar_class_init (GcalWeekHourBarClass *klass)
 static void
 gcal_week_hour_bar_init (GcalWeekHourBar *self)
 {
+  GcalContext *context = gcal_application_get_context (GCAL_DEFAULT_APPLICATION);
   gint i;
 
   g_object_set (self,
@@ -112,15 +113,6 @@ gcal_week_hour_bar_init (GcalWeekHourBar *self)
 
       self->labels[i] = GTK_LABEL (label);
     }
-}
-
-void
-gcal_week_hour_bar_set_context (GcalWeekHourBar *self,
-                                GcalContext     *context)
-{
-  g_return_if_fail (GCAL_IS_WEEK_HOUR_BAR (self));
-
-  self->context = context;
 
   g_signal_connect_object (context,
                            "notify::time-format",