[gtk/wip/jimmac/active-state-for-checkradios] Adwaita: fix active state for radios & checkboxes

[Jakub Steiner <jimmac src gnome org>]

commit ed2a4e2d93f3ab3f50776be21c9b857ad4df4958
Author: Jakub Steiner <jimmac gmail com>
Date:   Wed Apr 15 13:34:41 2020 +0200

    Adwaita: fix active state for radios & checkboxes
    
    Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/2493

 gtk/theme/Adwaita/_drawing.scss | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gtk/theme/Adwaita/_drawing.scss b/gtk/theme/Adwaita/_drawing.scss
index 3c1de0e34e..7020c4044f 100644
--- a/gtk/theme/Adwaita/_drawing.scss
+++ b/gtk/theme/Adwaita/_drawing.scss
@@ -585,7 +585,8 @@
   }
 
   @if $t==active {
-    box-shadow: inset 0 1px 1px 0px if($variant == 'light', rgba(0, 0, 0, 0.2), black);
+    box-shadow: inset 0 1px if($variant == 'light', rgba(0, 0, 0, 0.2), black);
+    background-image: if($c == white, image(darken($c, 15%)), image(darken($c, 5%)));
   }
 
   @if $t==insensitive {