Hide options menu in folders list

app/src/main/java/eu/faircode/email/FragmentFolders.java

@@ -28,6 +28,7 @@ import android.support.design.widget.FloatingActionButton;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
+import android.view.Menu;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ProgressBar;
@@ -47,6 +48,7 @@ public class FragmentFolders extends FragmentEx {
     @Nullable
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
         setSubtitle(R.string.title_list_folders);
+        setHasOptionsMenu(true);
 
         View view = inflater.inflate(R.layout.fragment_folders, container, false);
 
@@ -92,4 +94,9 @@ public class FragmentFolders extends FragmentEx {
 
         return view;
     }
+
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        menu.clear();
+    }
 }