File link-selected-is-optional.patch of Package greybird-theme

diff -rub a/light/gtk-4.0/_common.scss b/light/gtk-4.0/_common.scss
--- a/light/gtk-4.0/_common.scss	2023-01-16 09:59:06.618277289 +0800
+++ b/light/gtk-4.0/_common.scss	2023-01-16 10:06:48.039205675 +0800
@@ -1547,7 +1547,7 @@
       box-shadow: inset 0 1px mix($top_hilight, $selected_bg_color, 60%);
     }
 
-    .subtitle:link { @extend *:link:selected;  }
+    .subtitle:link { @extend *:link:selected !optional;  }
 
     button {
       @include button(normal, $selected_bg_color, $selected_fg_color);