[gnome-boxes] wizard: Empty password entry reverts back

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit dd2bbed7fc61a2c71057ba749c980ea14db0b2f0
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Oct 16 05:01:26 2012 +0300

    wizard: Empty password entry reverts back
    
    When password entry loses input focus while its empty, it should revert
    back to 'Add password' button.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=677176

 src/unattended-installer.vala |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/unattended-installer.vala b/src/unattended-installer.vala
index a1ea8b3..43f295b 100644
--- a/src/unattended-installer.vala
+++ b/src/unattended-installer.vala
@@ -278,6 +278,11 @@ private abstract class Boxes.UnattendedInstaller: InstallerMedia {
             notebook.next_page ();
             password_entry.is_focus = true;
         });
+        password_entry.focus_out_event.connect (() => {
+            if (password_entry.text_length == 0)
+                notebook.prev_page ();
+            return false;
+        });
         setup_table.attach_defaults (notebook, 2, 3, 2, 3);
 
         foreach (var child in setup_table.get_children ())