[gnome-shell-sass] theme: Provide :checked state for buttons

[Florian Müllner <fmuellner src gnome org>]

commit 9d75e86e91c3119d0ff6fbdc3f41698bc7c89479
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Nov 8 14:23:53 2021 +0100

    theme: Provide :checked state for buttons
    
    Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4757
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2027>

 _common.scss | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/_common.scss b/_common.scss
index 9df3d8d..0f3f3ee 100644
--- a/_common.scss
+++ b/_common.scss
@@ -116,7 +116,7 @@ stage {
   &:focus { @include button(focus);}
   &:hover { @include button(hover);}
   &:insensitive { @include button(insensitive);}
-  &:active { @include button(active);}
+  &:active, &:checked { @include button(active);}
 }
 
 // buttons in dialogs