[gnome-shell-extensions] classic: never show drop shadow for panel icons

[Florian Müllner <fmuellner src gnome org>]

commit 3398e740059b2ec942cc546fb9905d70c4b48cd3
Author: Jonas Kümmerlin <rgcjonas gmail com>
Date:   Wed Jan 24 22:24:06 2018 +0100

    classic: never show drop shadow for panel icons
    
    https://gitlab.gnome.org/GNOME/gnome-shell-extensions/issues/39

 data/gnome-classic.css  | 2 ++
 data/gnome-classic.scss | 4 ++++
 2 files changed, 6 insertions(+)
---
diff --git a/data/gnome-classic.css b/data/gnome-classic.css
index db71e0d..9a66d58 100644
--- a/data/gnome-classic.css
+++ b/data/gnome-classic.css
@@ -1917,6 +1917,8 @@ StScrollBar {
       width: 0;
       height: 0;
       margin: 0; }
+    #panel .panel-button .system-status-icon {
+      icon-shadow: none; }
   #panel .panel-corner,
   #panel .panel-corner:active,
   #panel .panel-corner:overview,
diff --git a/data/gnome-classic.scss b/data/gnome-classic.scss
index 63302e7..55eacdf 100644
--- a/data/gnome-classic.scss
+++ b/data/gnome-classic.scss
@@ -45,6 +45,10 @@ $variant: 'light';
       & .system-status-icon { icon-shadow: none; }
     }
     .app-menu-icon { width: 0; height: 0; margin: 0; } // shell's display:none; :D
+
+    .system-status-icon {
+      icon-shadow: none;
+    }
   }
 
   .panel-corner,