Fixed labels icon being hidden in collapsed issuable sidebar

app/views/shared/issuable/_sidebar.html.haml

@@ -121,7 +121,7 @@
         - selected_labels = issuable.labels
         .block.labels
           .sidebar-collapsed-icon.js-sidebar-labels-tooltip{ title: issuable_labels_tooltip(issuable.labels_array), data: { placement: "left", container: "body" } }
-            = icon('tags', class: 'hidden', 'aria-hidden': 'true')
+            = icon('tags', 'aria-hidden': 'true')
             %span
               = selected_labels.size
           .title.hide-collapsed

spec/javascripts/right_sidebar_spec.js

@@ -78,5 +78,11 @@ import '~/right_sidebar';
 
       expect(todoToggleSpy.calls.count()).toEqual(1);
     });
+
+    it('should not hide collapsed icons', () => {
+      [].forEach.call(document.querySelectorAll('.sidebar-collapsed-icon'), (el) => {
+        expect(el.querySelector('.fa, svg').classList.contains('hidden')).toBeFalsy();
+      });
+    });
   });
 }).call(window);