Group sidebar now has got the indicator as well

view/theme/frio/css/style.css

@@ -2938,6 +2938,7 @@ details.profile-jot-net[open] summary:before {
     content: "\f0da"; /* Right Plain Pointer */
 }
 .widget > .fakelink > h3:before,
+#sidebar-group-header > .fakelink > h3:before,
 .settings-block > .fakelink > h3:before {
     font-family: ForkAwesome;
     content: "\f0d7"; /* Bottom Plain Pointer */