Adds gl button classes to manifest imports

app/views/import/manifest/_form.html.haml

@@ -19,5 +19,5 @@
       = link_to sprite_icon('question-o'), help_page_path('user/project/import/manifest')
 
   .gl-mb-3
-    = submit_tag _('List available repositories'), class: 'btn btn-success'
-    = link_to _('Cancel'), new_project_path, class: 'btn btn-cancel'
+    = submit_tag _('List available repositories'), class: 'gl-button btn btn-success'
+    = link_to _('Cancel'), new_project_path, class: 'gl-button btn btn-default btn-cancel'

changelogs/unreleased/231189-manifest-dir-buttons.yml

+---
+title: Adds gl button classes to manifest imports
+merge_request: 48697
+author:
+type: other