[gnome-control-center] bluetooth: Don't use gtk_widget_show_all

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 256dccb7d6e59486236d5d98851727a250b383d1
Author: Robert Ancell <robert ancell canonical com>
Date:   Mon Oct 1 15:14:48 2018 +1300

    bluetooth: Don't use gtk_widget_show_all
    
    It is removed in GTK+ 4

 panels/bluetooth/cc-bluetooth-panel.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/panels/bluetooth/cc-bluetooth-panel.c b/panels/bluetooth/cc-bluetooth-panel.c
index ba6cce266..9f4ca40ae 100644
--- a/panels/bluetooth/cc-bluetooth-panel.c
+++ b/panels/bluetooth/cc-bluetooth-panel.c
@@ -106,7 +106,7 @@ cc_bluetooth_panel_constructed (GObject *object)
        self->kill_switch_header = g_object_ref (WID ("box_power"));
        cc_shell_embed_widget_in_header (cc_panel_get_shell (CC_PANEL (self)),
                                         self->kill_switch_header);
-       gtk_widget_show_all (self->kill_switch_header);
+       gtk_widget_show (self->kill_switch_header);
 }
 
 static void
@@ -237,6 +237,7 @@ add_stack_page (CcBluetoothPanel *self,
        char *str;
 
        box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+       gtk_widget_show (box);
        g_object_set (G_OBJECT (box), "margin-top", 64, "margin-bottom", 64, NULL);
        g_object_set (G_OBJECT (box), "margin-start", 12, "margin-end", 12, NULL);
 
@@ -248,17 +249,20 @@ add_stack_page (CcBluetoothPanel *self,
                image = gtk_image_new_from_icon_name ("bluetooth-active-symbolic",
                                                      GTK_ICON_SIZE_DIALOG);
        }
+       gtk_widget_show (image);
        gtk_image_set_pixel_size (GTK_IMAGE (image), 192);
        gtk_style_context_add_class (gtk_widget_get_style_context (image), "dim-label");
        gtk_box_pack_start (GTK_BOX (box), image, FALSE, FALSE, 24);
 
        str = g_strdup_printf ("<span size=\"larger\" weight=\"bold\">%s</span>", message);
        label = gtk_label_new ("");
+       gtk_widget_show (label);
        gtk_label_set_markup (GTK_LABEL (label), str);
        g_free (str);
        gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
 
        label = gtk_label_new (explanation);
+       gtk_widget_show (label);
        gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
        gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
 
@@ -266,6 +270,7 @@ add_stack_page (CcBluetoothPanel *self,
                GtkWidget *button;
 
                button = gtk_button_new_with_label (_("Turn Off Airplane Mode"));
+               gtk_widget_show (button);
                gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
                gtk_widget_set_halign (button, GTK_ALIGN_CENTER);
                g_signal_connect (G_OBJECT (button), "clicked",
@@ -274,7 +279,6 @@ add_stack_page (CcBluetoothPanel *self,
        }
 
        gtk_stack_add_named (GTK_STACK (self->stack), box, name);
-       gtk_widget_show_all (box);
 }
 
 static void