settings: Don't show save-discard widget unnecessarily.

Previously, save discard buttons were shown even when
changing only the order of pills in the widget.

This commit updates get_group_setting_widget_value to
return member and subgroup IDs in sorted order, as
member and subgroup IDs in original values are also
sorted so the save-discard buttons are not visible
when only order is changed.

web/src/settings_components.ts

@@ -914,8 +914,8 @@ export function get_group_setting_widget_value(
     }
 
     return {
-        direct_subgroups,
-        direct_members,
+        direct_subgroups: direct_subgroups.sort(),
+        direct_members: direct_members.sort(),
     };
 }