[gtk/wip/exalm/polish: 1/8] adwaita: Update app icon shadow

[Alexander Mikhaylenko <alexm src gnome org>]

commit 3a5fdfcfda2296632eb7f582d3f3aef46f06fe71
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Thu May 7 00:15:19 2020 +0500

    adwaita: Update app icon shadow
    
    Port f95f3c707aa5a4b1c7b76b2bb43a43519eaf9433 from GTK3.

 gtk/theme/Adwaita/_common.scss | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 6b5d9f5c10..1c2a87c5fc 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -4251,8 +4251,11 @@ stackswitcher.circular {
 
 /* Drapshadow for large icons */
 .icon-dropshadow {
-  -gtk-icon-shadow: 0 2px 12px rgba(0,0,0,0.2),
-               0 1px 2px rgba(0,0,0,0.7);
+  -gtk-icon-shadow: 0 1px 12px rgba(0,0,0,0.05),
+      0 -1px rgba(0,0,0,0.05),
+      1px 0 rgba(0,0,0,0.1),
+      0 1px rgba(0,0,0,0.3),
+      -1px 0 rgba(0,0,0,0.1);
 }
 
 /*********