Add missing inner container for right sidebar

app/javascript/mastodon/features/ui/components/columns_area.jsx

@@ -155,8 +155,10 @@ export default class ColumnsArea extends ImmutablePureComponent {
             <div className='columns-area columns-area--mobile'>{children}</div>
           </div>
 
-          <div className='columns-area__panels__pane columns-area__panels__pane--start columns-area__panels__pane--navigational columns-area__panels__pane__inner'>
-            <NavigationPanel />
+          <div className='columns-area__panels__pane columns-area__panels__pane--start columns-area__panels__pane--navigational'>
+            <div className='columns-area__panels__pane__inner'>
+              <NavigationPanel />
+            </div>
           </div>
         </div>
       );