theme: make overview thumbnails rounder

- match gtk Adwaita

Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/1449

diff --git a/data/theme/gnome-shell-sass/_common.scss b/data/theme/gnome-shell-sass/_common.scss
index 97d2fecfeba7c5489310d195a1df2c93c0e8a61e..fb66437a7fa16b56e6f23d4869deda26b8299e84 100644 (file)
--- a/data/theme/gnome-shell-sass/_common.scss
+++ b/data/theme/gnome-shell-sass/_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