[gnome-shell] highlight session menu button on key focus

[Jasper St. Pierre <jstpierre src gnome org>]

commit eea689841be03e2b303863c04f2c665e2f0b0fcf
Author: Sebastien Lafargue <slaf66 gmail com>
Date:   Sun Oct 20 12:59:23 2013 +0200

    highlight session menu button on key focus
    
    https://bugzilla.gnome.org/show_bug.cgi?id=710539

 data/theme/gnome-shell.css |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index dc008e4..55c45cb 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -2409,6 +2409,7 @@ StScrollBar StButton#vhandle:active {
 }
 
 .login-dialog-session-list-button:hover,
+.login-dialog-session-list-button:focus,
 .login-dialog-session-list-button:active {
     color: white;
 }