Fix obscured arrow in runner recent searches

app/views/admin/runners/index.html.haml

@@ -50,7 +50,7 @@
         .filtered-search-box
           = dropdown_tag(_('Recent searches'),
             options: { wrapper_class: 'filtered-search-history-dropdown-wrapper',
-            toggle_class: 'gl-button btn filtered-search-history-dropdown-toggle-button',
+            toggle_class: 'btn filtered-search-history-dropdown-toggle-button',
             dropdown_class: 'filtered-search-history-dropdown',
             content_class: 'filtered-search-history-dropdown-content' }) do
             .js-filtered-search-history-dropdown{ data: { full_path: admin_runners_path } }