event-editor/multi-choice: Set accessible label without connecting signal

Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/840>

src/gui/event-editor/gcal-multi-choice.blp

@@ -3,7 +3,6 @@ using Gtk 4.0;
 template $GcalMultiChoice: Box {
   spacing: 6;
   accessible-role: spin_button;
-  notify::category => $set_accessibility_label() swapped;
 
   Button down_button {
     icon-name: "pan-start-symbolic";

src/gui/event-editor/gcal-multi-choice.c

@@ -216,14 +216,6 @@ update_sensitivity (GcalMultiChoice *self)
                                    GTK_ACCESSIBLE_RELATION_CONTROLS);
 }
 
-static void
-set_accessibility_label (GcalMultiChoice *self)
-{
-  gtk_accessible_update_property (GTK_ACCESSIBLE (self),
-                                  GTK_ACCESSIBLE_PROPERTY_LABEL,
-                                  gcal_multi_choice_get_category (self), -1);
-}
-
 static void
 button_clicked_cb (GtkWidget       *button,
                    GcalMultiChoice *self)
@@ -617,7 +609,6 @@ gcal_multi_choice_class_init (GcalMultiChoiceClass *class)
   gtk_widget_class_bind_template_child (widget_class, GcalMultiChoice, label1);
   gtk_widget_class_bind_template_child (widget_class, GcalMultiChoice, label2);
 
-  gtk_widget_class_bind_template_callback (widget_class, set_accessibility_label);
   gtk_widget_class_bind_template_callback (widget_class, button_clicked_cb);
   gtk_widget_class_bind_template_callback (widget_class, button_toggled_cb);
   gtk_widget_class_bind_template_callback (widget_class, button_state_flags_changed_cb);
@@ -846,6 +837,10 @@ gcal_multi_choice_set_category (GcalMultiChoice *self,
     {
       self->category = g_strdup (category ? category : "");
 
+      gtk_accessible_update_property (GTK_ACCESSIBLE (self),
+                                      GTK_ACCESSIBLE_PROPERTY_LABEL, category,
+                                      -1);
+
       g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_CATEGORY]);
     }
 }