[gtk/wip/jimmac/sidebar-backdrop] Adwaita: don't backdrop labels

[Jakub Steiner <jimmac src gnome org>]

commit eda415acfa16500a14d02258ccb595cfcf8bd089
Author: Jakub Steiner <jimmac gmail com>
Date:   Thu Nov 19 17:03:43 2020 +0100

    Adwaita: don't backdrop labels
    
    - instead of overriding :backdrop for sidebars, continue pursuing
      not to backdrop anything but headerbar items and buttons.
    
    Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/3377

 gtk/theme/Adwaita/_common.scss | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 09b43d09df..37205f277c 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3623,6 +3623,11 @@ separator.sidebar {
       }
     }
 
+    &:selected:backdrop { //picks from buttons. See #3377
+      color: $fg_color;
+    }
+
+
     &:hover {
       color: $fg_color;
       background-color: darken($menu_selected_color, 5%);
@@ -4088,12 +4093,6 @@ tooltip.csd {
     @at-root %selected_items_disabled,
     &:disabled { color: mix($selected_fg_color, $selected_bg_color, 50%); }
 
-    @at-root %selected_items_backdrop,
-    &:backdrop {
-      color: $backdrop_selected_fg_color;
-
-      &:disabled { color: mix($backdrop_selected_fg_color, $selected_bg_color, 30%); }
-    }
   }
 }