[gnome-builder] style: compensate for using css for row separators

[Christian Hergert <chergert src gnome org>]

commit 9e09601cf3aba1a043d33177780a764e40e52e2e
Author: Christian Hergert <christian hergert me>
Date:   Mon May 11 13:13:50 2015 -0700

    style: compensate for using css for row separators
    
    This actually looks closer to the mockup anyway.

 data/theme/shared.css |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/shared.css b/data/theme/shared.css
index 2a5f291..96e876f 100644
--- a/data/theme/shared.css
+++ b/data/theme/shared.css
@@ -103,3 +103,10 @@ GbGreeterProjectRow,
 GtkListBoxRow.with-header {
   border-bottom: 1px solid alpha(@borders, 0.4);
 }
+
+GbGreeterWindow GtkFrame {
+  border-top: 1px solid alpha(@borders, 0.4);
+  border-left: 1px solid alpha(@borders, 0.4);
+  border-right: 1px solid alpha(@borders, 0.4);
+  border-bottom: none;
+}