[gnome-shell-sass] theme: make overview thumbnails rounder

[Florian Müllner <fmuellner src gnome org>]

commit 8a1f4ee7e571f3763f88e19c37c240be5eef2c12
Author: Jakub Steiner <jimmac gmail com>
Date:   Tue Jul 16 05:27:34 2019 +0200

    theme: make overview thumbnails rounder
    
    - match gtk Adwaita
    
    Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/1449

 _common.scss | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 97d2fec..fb66437 100644
--- a/_common.scss
+++ b/_common.scss
@@ -1342,8 +1342,8 @@ StScrollBar {
 
   .window-clone-border {
     $_bg: transparentize(white, 0.65);
-    border: 5px solid $_bg;
-    border-radius: 6px;
+    border: 7px solid $_bg;
+    border-radius: $modal_radius;
     // For window decorations with round corners we can't match
     // the exact shape when the window is scaled. So apply a shadow
     // to fix that case