[gtk/wip/jimmac/submenus] Adwaita: rounded submenus

[Jakub Steiner <jimmac src gnome org>]

commit 482fbd090b7c3ba162a5cf2bfaa09f7e504a9f86
Author: Jakub Steiner <jimmac gmail com>
Date:   Tue Sep 29 12:54:25 2020 +0200

    Adwaita: rounded submenus
    
    - all corners have rounded corners
    
    See https://gitlab.gnome.org/GNOME/gtk/-/issues/2745

 gtk/theme/Adwaita/_common.scss | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 56e0a8d277..2b5157b312 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -4161,8 +4161,6 @@ menubar {
       box-shadow: none;
     }
   }
-  // remove padding and rounding from menubar submenu decoration
-  .csd.popup decoration { border-radius:0; }
   // only bottom part rounded for menubar menus
   & > item popover.menu.background > contents {
     margin-top: -1px; //nudge it into the menubar
@@ -4173,7 +4171,7 @@ menubar {
   //nested submenus
   & > item popover.menu.background popover.menu.background > contents {
     margin: 0;
-    border-radius: 0;
+    border-radius: $popover_radius; //including top
   }
 }