[epiphany/mcatanzaro/#1570] passwords-view: fix the Clear All action

[Michael Catanzaro <mcatanzaro src gnome org>]

commit d7e8c3d34dd1c1dd70251cea44a8bd2390db3a95
Author: Michael Catanzaro <mcatanzaro redhat com>
Date:   Sun Aug 1 09:16:16 2021 -0500

    passwords-view: fix the Clear All action
    
    Apparently people don't try to delete all their passwords very often,
    because this has been broken for the past year and nobody noticed until
    now. Whatever. The dialog is no longer a GtkWindow so we just have to
    find the parent window instead.

 src/preferences/passwords-view.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/src/preferences/passwords-view.c b/src/preferences/passwords-view.c
index b4df843af..bf56cb353 100644
--- a/src/preferences/passwords-view.c
+++ b/src/preferences/passwords-view.c
@@ -183,9 +183,14 @@ confirmation_dialog_response_cb (GtkWidget         *dialog,
 static GtkWidget *
 confirmation_dialog_construct (EphyPasswordsView *self)
 {
-  GtkWidget *dialog, *button;
+  GtkWidget *dialog;
+  GtkWidget *button;
+  GtkWidget *w = gtk_widget_get_parent (GTK_WIDGET (self));
 
-  dialog = gtk_message_dialog_new (GTK_WINDOW (self),
+  while (!GTK_IS_WINDOW (w))
+    w = gtk_widget_get_parent (w);
+
+  dialog = gtk_message_dialog_new (GTK_WINDOW (w),
                                    GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
                                    GTK_MESSAGE_WARNING,
                                    GTK_BUTTONS_CANCEL,
@@ -194,7 +199,7 @@ confirmation_dialog_construct (EphyPasswordsView *self)
   gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
                                             _("This will clear all locally stored passwords, and can not be 
undone."));
 
-  gtk_window_group_add_window (ephy_gui_ensure_window_group (GTK_WINDOW (self)),
+  gtk_window_group_add_window (ephy_gui_ensure_window_group (GTK_WINDOW (w)),
                                GTK_WINDOW (dialog));
 
   button = gtk_button_new_with_mnemonic (_("_Delete"));