[gtk] Revert "Adwaita: avoid clipping menu/popover shadow"

[Jakub Steiner <jimmac src gnome org>]

commit 1501aa0603463ea6384e1211f7329839f266f635
Author: Jakub Steiner <jimmac gmail com>
Date:   Tue Nov 17 16:48:49 2020 +0100

    Revert "Adwaita: avoid clipping menu/popover shadow"
    
    There are big side effects to adding padding around all menus and popovers.
    
    https://gitlab.gnome.org/GNOME/gtk/-/issues/1987#note_963889
    
    This reverts commit d266bd62deaa5752ae79fe055696a9e1e411de2f.

 gtk/theme/Adwaita/_common.scss | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 68dd817677..a5b33be009 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -4141,7 +4141,7 @@ popover.entry-completion > contents {
 $_menu-padding: 12px;
 
 popover.menu {
-  padding: 2px 2px 2px 4px; //allow some shadow. #1987
+  padding: 0;
 
   box.inline-buttons {
     padding: 0 $_menu-padding;