[gnome-shell] gdm: add prelight to Not Listed? button

[Ray Strode <halfline src gnome org>]

commit a103c028f9c518cdff6b6d5513cf9b13d61893af
Author: Ray Strode <rstrode redhat com>
Date:   Mon Oct 17 00:43:12 2011 -0400

    gdm: add prelight to Not Listed? button
    
    The prelight makes it clearer that the button is
    clickable, and makes it more consistent with other
    clickable parts of the dialog.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=659763

 data/theme/gdm.css |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/gdm.css b/data/theme/gdm.css
index 83a09c1..b6a7e8c 100644
--- a/data/theme/gdm.css
+++ b/data/theme/gdm.css
@@ -98,6 +98,10 @@
     color: #666666;
 }
 
+.login-dialog-not-listed-button:hover .login-dialog-not-listed-label {
+    color: white;
+}
+
 .login-dialog-prompt-layout {
     padding-bottom: 32px;
 }