[gnome-shell] theme: app icon helper tweaks

[Jakub Steiner <jimmac src gnome org>]

commit 43443d08ae0e82187bac43cd36414026f620f7f1
Author: Jakub Steiner <jimmac gmail com>
Date:   Thu Jul 18 05:03:08 2019 +0200

    theme: app icon helper tweaks
    
    Shell cannot composite multiple shadows, simplify to only use one.
    
    https://gitlab.gnome.org/GNOME/gnome-shell-extensions/issues/168

 data/theme/gnome-shell-sass/_common.scss | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/data/theme/gnome-shell-sass/_common.scss b/data/theme/gnome-shell-sass/_common.scss
index fb66437a7..dd716004b 100644
--- a/data/theme/gnome-shell-sass/_common.scss
+++ b/data/theme/gnome-shell-sass/_common.scss
@@ -624,16 +624,12 @@ StScrollBar {
  *************/
 /* Outline for low res icons */
 .lowres-icon {
-    icon-shadow: 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);
+    icon-shadow: 0 1px 2px rgba(0,0,0,0.3);
 }
 
 /* Drapshadow for large icons */
 .icon-dropshadow {
-  icon-shadow: 0 2px 12px rgba(0,0,0,0.1),
-               0 1px 2px rgba(0,0,0,0.5);
+  icon-shadow: 0 1px 2px rgba(0,0,0,0.4);
 }
 
 /* OSD */