[gtk/wip/jimmac/HC-slider-border] HC: fix switch slider borders

[Jakub Steiner <jimmac src gnome org>]

commit 41b2a38764d818a77dcfc53d39854571a491c4d3
Author: Jakub Steiner <jimmac gmail com>
Date:   Wed Apr 22 11:51:27 2020 +0200

    HC: fix switch slider borders
    
    - HC got caught up on a condition made for color (suggested) buttons.
      the rule just made the slider a tag lighter on dark probably due to the
      overlaid AA making it stronger. Got rid of it for now, if someone cares
      enough we can reintroduce an exception (that doesn't break HC).

 gtk/theme/Adwaita/_common.scss  | 8 ++------
 gtk/theme/Adwaita/_drawing.scss | 2 +-
 2 files changed, 3 insertions(+), 7 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index c9b3178f8a1..10462dd7b8a 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -2337,15 +2337,11 @@ switch {
     min-width: 24px;
     min-height: 24px;
     border: 1px solid;
+    border-color: $borders_color;
     border-radius: 50%;
     transition: $button_transition;
 
-    @if $variant == 'light' {
-      @include button(normal-alt, $edge: $shadow_color);
-    } 
-    @else {
-      @include button(normal-alt, $c: lighten($bg_color,6%), $edge: $shadow_color);
-    }
+    @include button(normal-alt, $edge: $shadow_color);
   }
   
   > image { color: transparent; } /* only show i / o for the accessible theme */
diff --git a/gtk/theme/Adwaita/_drawing.scss b/gtk/theme/Adwaita/_drawing.scss
index 1e601a63af1..e6fd2590744 100644
--- a/gtk/theme/Adwaita/_drawing.scss
+++ b/gtk/theme/Adwaita/_drawing.scss
@@ -198,7 +198,7 @@
   // normal button alternative look
   //
     color: $tc;
-    border-color: if($c != $bg_color, _border_color($c, true), $alt_borders_color);
+    border-color: if($c != $bg_color, _border_color($c, true), $alt_borders_color); //colored buttons
     @if $variant == 'light' {
       background-image: linear-gradient(to bottom, lighten($c, 5%) 20%, $c 90%);
       @include _shadows(inset 0 1px _button_hilight_color(lighten($c, 6%)),