view thread controller: fix hints.

Clover/app/src/main/java/org/floens/chan/ui/controller/ViewThreadController.java

@@ -203,14 +203,26 @@ public class ViewThreadController extends ThreadController implements ThreadLayo
             updateLeftPaneHighlighting(loadable);
             presenter.requestInitialData();
 
+            showHints();
+        }
+    }
+
+    private void showHints() {
         int counter = ChanSettings.threadOpenCounter.increase();
         if (counter == 2) {
+            view.postDelayed(() -> {
                 View view = navigation.findItem(ToolbarMenu.OVERFLOW_ID).getView();
+                if (view != null) {
                     HintPopup.show(context, view, context.getString(R.string.thread_up_down_hint), -dp(1), 0);
+                }
+            }, 600);
         } else if (counter == 3) {
+            view.postDelayed(() -> {
                 View view = navigation.findItem(PIN_ID).getView();
+                if (view != null) {
                     HintPopup.show(context, view, context.getString(R.string.thread_pin_hint), -dp(1), 0);
                 }
+            }, 600);
         }
     }