[gtk/wip/jimmac/sidebar-hover-selected-focus] Adwaita: selected:hover and focus:selected:hover states

[Jakub Steiner <jimmac src gnome org>]

commit f1e9f853decfba7e47d4555722b63350ffb3fbaa
Author: Jakub Steiner <jimmac gmail com>
Date:   Tue Oct 13 21:27:17 2020 +0200

    Adwaita: selected:hover and focus:selected:hover states
    
    - getting pretty deep, but visually seems to make sense. Selected row hovers
      increase contrast.
    
    Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/3251

 gtk/theme/Adwaita/_common.scss | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 8f45f24d74..212ee4ae07 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3460,10 +3460,11 @@ separator.sidebar {
         outline-width: 0;
         color: $selected_fg_color;
         background-color: $selected_bg_color;
+        &:hover { background-color: darken($selected_bg_color,10%); }
       }
       &:hover:not(:last-child) { /* FIXME: dirty specificity bump */
-        color: $fg_color;
-        background-color: $menu_selected_color;
+        color: $selected_fg_color;
+        background-color: darken(desaturate($selected_bg_color,100%),10%);
       }
     }