avatar should be aria-hidden

routes/_components/status/StatusSidebar.html

@@ -1,6 +1,8 @@
 <a class="status-sidebar size-{{size}}"
    href="/accounts/{{originalAccountId}}"
-   focus-key="{{focusKey}}" >
+   focus-key="{{focusKey}}"
+   aria-hidden="true"
+>
   <Avatar account={{originalAccount}}
           isLink="true"
           :size />