[gnome-shell-sass] panel: Animate opacity changes of the panel corner

[Florian Müllner <fmuellner src gnome org>]

commit 2e3c25cf6ba2c576c13ac3dbd7ed0bc208d9235a
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Mon Feb 11 23:05:31 2019 +0100

    panel: Animate opacity changes of the panel corner
    
    This is a requirement for fading the transparent panel in and out
    smoothly.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1397>

 widgets/_panel.scss | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/widgets/_panel.scss b/widgets/_panel.scss
index 9c41c15..5734ab1 100644
--- a/widgets/_panel.scss
+++ b/widgets/_panel.scss
@@ -34,6 +34,7 @@ $panel_height: 2.2em;
     -panel-corner-radius: $panel_corner_radius;
     -panel-corner-background-color: $panel_bg_color;
     -panel-corner-border-width: 2px;
+    -panel-corner-opacity: 1;
   }
 
   // panel menus