Starrers view: fix search bar when a query did not match anything

app/views/projects/starrers/index.html.haml

@@ -5,7 +5,7 @@
     %span.flex-project-title
       = _("Starrers of <strong>%{project_name}</strong>").html_safe % { project_name: sanitize_project_name(@project.name) }
     %span.badge.badge-pill= @starrers.total_count
-  - if @starrers.size > 0
+  - if @starrers.size > 0 || params[:search].present?
     .nav-controls
       = form_tag request.original_url, method: :get, class: 'form-inline user-search-form flex-users-form' do
         .form-group