[libadwaita/wip/exalm/calendar-tnum] stylesheet: Use tabular figures for calendar

[Alexander Mikhaylenko <alexm src gnome org>]

commit 7bf80b5d7f15b8dd98458f54861fcc5ee7497844
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Nov 28 00:29:11 2021 +0500

    stylesheet: Use tabular figures for calendar
    
    See https://gitlab.gnome.org/GNOME/gtk/-/commit/03d4ac1863abf846eeb270954f49d8b417a32d9b

 src/stylesheet/widgets/_calendar.scss | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/stylesheet/widgets/_calendar.scss b/src/stylesheet/widgets/_calendar.scss
index 94a10090..89c85348 100644
--- a/src/stylesheet/widgets/_calendar.scss
+++ b/src/stylesheet/widgets/_calendar.scss
@@ -2,6 +2,7 @@ calendar {
   color: $view_fg_color;
   background-clip: padding-box;
   border: 1px solid $border_color;
+  font-feature-settings: "tnum";
 
   > header {
     border-bottom: 1px solid $border_color;