[gtk/wip/jimmac/adjust-for-contemporary-trends] Adwaita: scales border

[Jakub Steiner <jimmac src gnome org>]

commit 378ad75d487c077adabc5efa8e0af8a56ce1263f
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Jan 11 16:00:32 2021 +0100

    Adwaita: scales border
    
    - remove -alt specialcasing for a straight forward border like
      everything else and avoid broken :dark and HC

 gtk/theme/Adwaita/_common.scss | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index d0bda3fe51..2ca1d9c451 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -2675,8 +2675,8 @@ scale {
 
   > trough > slider {
     @include button(normal);
-
-    border: 1px solid darken($alt_borders_color, 3%);
+    border-width: 1px;
+    border-style: solid;
     border-radius: 100%;
     transition: $button_transition;
     transition-property: background, border, box-shadow;