adwaita: Update app icon shadow

Port f95f3c707aa5a4b1c7b76b2bb43a43519eaf9433 from GTK3.

diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 6b5d9f5c10b341cc1a97d978e5fdc10d8165334c..1c2a87c5fcfdb193a5f95f2330c148cea98b8fd6 100644 (file)
--- 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);
 }
 
 /*********