[gnome-shell] theme: Make Dash background color solid

[Marge Bot <marge-bot src gnome org>]

commit 0d4eaa6f197641bba2030e3b8bed91ab5182c425
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Jan 21 19:02:00 2021 -0300

    theme: Make Dash background color solid
    
    This is the same color that the Dash currently has, except
    it isn't transparent.
    
    The reason for this change is that the app grid coming from
    the bottom and passing below the Dash looks odd with the
    transparency there.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1593>

 data/theme/gnome-shell-sass/widgets/_dash.scss | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/data/theme/gnome-shell-sass/widgets/_dash.scss b/data/theme/gnome-shell-sass/widgets/_dash.scss
index 50483830b9..a1f6249cca 100644
--- a/data/theme/gnome-shell-sass/widgets/_dash.scss
+++ b/data/theme/gnome-shell-sass/widgets/_dash.scss
@@ -1,11 +1,12 @@
 /* Dash */
 
+$dash_background_color: #3b3b3b;
 $dash_placeholder_size: 32px;
 $dash_spacing: $base_padding + 4px;
 $dash_border_radius: $modal_radius * 1.5;
 
 #dash {
-  @extend %overview_panel;
+  background-color: $dash_background_color;
   @include fontsize($base_font_size - 2);
   margin: $base_margin * 4 $base_margin * 2;
   padding: ($dash_spacing / 2) 0;