[gnome-shell/gnome-3-14] gdm: fix sensitivity of auth prompt when cancelling early and user list is disabled

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2ceaa05a5a3aa3e8b9c67877eb968b2813fb4d18
Author: Ray Strode <rstrode redhat com>
Date:   Tue Oct 7 14:30:34 2014 -0400

    gdm: fix sensitivity of auth prompt when cancelling early and user list is disabled
    
    If the user list is disabled and the user clicks cancel quickly enough
    after typing their username, they can get in a state where the
    auth prompt gets stuck in the insensitive state.
    
    This is because the login dialog code makes the prompt insensitive
    while while pam is processing the provided username, but the prompt
    only makes itself sensitive again when it is hidden.
    
    This commit makes it sensitive right before asking for a username again.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=740141

 js/gdm/loginDialog.js |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index ceaccaa..6a8ae0a 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -643,6 +643,8 @@ const LoginDialog = new Lang.Class({
                                                         realmManager.release();
                                                     }));
         this._updateCancelButton();
+
+        this._authPrompt.updateSensitivity(true);
         this._showPrompt();
     },