fix bug with directory files upload

spec/features/user_manages_project_directories_spec.rb

@@ -51,6 +51,13 @@ RSpec.feature "User manages project custom folders", type: :feature do
 
     expect(page).to have_content("UPLOAD NEW FILES")
 
+    expect do
+      click_button "Upload Files"
+    end.not_to raise_exception
+
+    expect(page).to have_content("UPLOAD NEW FILES")
+    expect(page).not_to have_content("The folder has been updated")
+
     drop_file Rails.root.join(file_fixture("person_photo.png")), type: :dropzone
 
     click_button "Upload Files"