[gtk/wip/jimmac/navlist-expander-whitespace] Adwaita: navigation list expander whitespace

[Jakub Steiner <jimmac src gnome org>]

commit e7c75f04ddfb2ab0edefd0f6b3345fd86972c787
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Sep 14 14:31:23 2020 +0200

    Adwaita: navigation list expander whitespace
    
     - Address https://gitlab.gnome.org/GNOME/gtk/-/issues/3138#note_910476

 gtk/theme/Adwaita/_common.scss | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index c0f291478e..0c7b2f8c07 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3205,6 +3205,7 @@ expander-widget {
   }
 }
 
+.navigation-sidebar,
 placessidebar,
 stackswitcher,
 expander-widget {
@@ -3404,6 +3405,12 @@ separator.sidebar {
     // will make the animation of the new bookmark row jump
     > revealer { padding: 0 14px; }
 
+    expander {
+      margin: 0 8px 0 0;
+
+      &:dir(rtl) { margin: 0 0 0 8px; }
+    }
+
     &:selected {
       background-color: desaturate($selected_bg_color,100%);
       color: $selected_fg_color;