Manually migrate unusual cases

app/views/projects/_home_panel.html.haml

@@ -27,9 +27,7 @@
     .project-repo-buttons.gl-display-flex.gl-justify-content-md-end.gl-align-items-center.gl-flex-wrap.gl-gap-3
       - if current_user
         - if current_user.admin?
-          = link_to [:admin, @project], class: 'btn btn-default gl-button btn-icon', title: _('View project in admin area'),
-            data: {toggle: 'tooltip', placement: 'top', container: 'body'} do
-            = sprite_icon('admin')
+          = link_button_to nil, [:admin, @project], icon: 'admin', title: _('View project in admin area'), data: {toggle: 'tooltip', placement: 'top', container: 'body'}
         - if @notification_setting
           .js-vue-notification-dropdown{ data: { disabled: emails_disabled.to_s, dropdown_items: notification_dropdown_items(@notification_setting).to_json, notification_level: @notification_setting.level, help_page_path: help_page_path('user/profile/notifications'), project_id: @project.id, no_flip: 'true' } }
 

app/views/projects/buttons/_download_links.html.haml

 .btn-group.ml-0.w-100
   - Gitlab::Workhorse::ARCHIVE_FORMATS.each_with_index do |fmt, index|
     - archive_path = project_archive_path(project, id: tree_join(ref, archive_prefix), path: path, format: fmt)
-    = link_to fmt, external_storage_url_or_path(archive_path), rel: 'nofollow', download: '', class: "gl-button btn btn-sm #{index == 0 ? 'btn-confirm' : 'btn-default'}"
+    = link_button_to fmt, external_storage_url_or_path(archive_path), rel: 'nofollow', download: '', variant: index == 0 ? :confirm : :default, size: :small