[libadwaita] toast-overlay: Set overflow=hidden

[Alexander Mikhaylenko <alexm src gnome org>]

commit 60b274cefee078231d5c47547f6ac159db809d27
Author: Ivan Molodetskikh <yalterz gmail com>
Date:   Fri Dec 3 21:26:09 2021 +0300

    toast-overlay: Set overflow=hidden
    
    When the overlay is not covering the whole window, if the overflow is
    visible, toasts will initially appear from below the widget which looks
    strange.

 src/adw-toast-overlay.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/adw-toast-overlay.c b/src/adw-toast-overlay.c
index c22d0781..b76c0b72 100644
--- a/src/adw-toast-overlay.c
+++ b/src/adw-toast-overlay.c
@@ -453,6 +453,8 @@ static void
 adw_toast_overlay_init (AdwToastOverlay *self)
 {
   self->queue = g_queue_new ();
+
+  gtk_widget_set_overflow (GTK_WIDGET (self), GTK_OVERFLOW_HIDDEN);
 }
 
 static void