[gnome-boxes] Use Gtk.Notebook for password input

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 4c0157e4df88d9cf4b6145769d1b7e576f7a756d
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Mon Dec 12 23:50:20 2011 +0200

    Use Gtk.Notebook for password input
    
    No need to do weird things like replacing widgets on the fly when
    Gtk.Notebook provides an easy way to achieve this.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=666032

 src/unattended-installer.vala |   19 ++++++++++++-------
 1 files changed, 12 insertions(+), 7 deletions(-)
---
diff --git a/src/unattended-installer.vala b/src/unattended-installer.vala
index adc2f05..cce915d 100644
--- a/src/unattended-installer.vala
+++ b/src/unattended-installer.vala
@@ -169,20 +169,25 @@ private abstract class Boxes.UnattendedInstaller: InstallerMedia {
         label.halign = Gtk.Align.END;
         label.valign = Gtk.Align.CENTER;
         setup_table.attach_defaults (label, 1, 2, 2, 3);
+
+        var notebook = new Gtk.Notebook ();
+        notebook.show_tabs = false;
+        notebook.show_border = false;
+        notebook.halign = Gtk.Align.START;
+        notebook.valign = Gtk.Align.CENTER;
+        var button = new Gtk.Button.with_mnemonic (_("_Add Password"));
+        button.visible = true;
+        notebook.append_page (button);
         password_entry = new Gtk.Entry ();
         password_entry.visibility = false;
         password_entry.visible = true;
         password_entry.text = "";
-        password_entry.halign = Gtk.Align.START;
-        password_entry.valign = Gtk.Align.CENTER;
-        var button = new Gtk.Button.with_mnemonic (_("_Add Password"));
-        button.valign = Gtk.Align.CENTER;
-        setup_table.attach_defaults (button, 2, 3, 2, 3);
+        notebook.append_page (password_entry);
         button.clicked.connect (() => {
-            setup_table.remove (button);
-            setup_table.attach_defaults (password_entry, 2, 3, 2, 3);
+            notebook.next_page ();
             password_entry.is_focus = true;
         });
+        setup_table.attach_defaults (notebook, 2, 3, 2, 3);
 
         foreach (var child in setup_table.get_children ())
             if (child != express_toggle)