[libhandy] flap: Update child visibility on realize()

[Adrien Plazas <aplazas src gnome org>]

commit 154c09a3bb879626fb90de8652eb77018530f02a
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue Mar 23 17:59:08 2021 +0500

    flap: Update child visibility on realize()
    
    We show windows when we create them. However, if a window needs to be
    hidden right away, we don't hide it until reveal progress changes sometime
    later.

 src/hdy-flap.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/hdy-flap.c b/src/hdy-flap.c
index dc3600f1..c4fd8b10 100644
--- a/src/hdy-flap.c
+++ b/src/hdy-flap.c
@@ -1251,6 +1251,7 @@ hdy_flap_realize (GtkWidget *widget)
   register_window (self, &self->separator);
   register_window (self, &self->flap);
 
+  update_child_visibility (self);
   restack_windows (self);
 }