Make edit/remove label buttons smaller

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/projects/labels/_label.html.haml

@@ -6,5 +6,5 @@
         = pluralize label.open_issues_count, 'open issue'
 
     - if can? current_user, :admin_label, @project
-      = link_to 'Edit', edit_namespace_project_label_path(@project.namespace, @project, label), class: 'btn'
-      = link_to 'Remove', namespace_project_label_path(@project.namespace, @project, label), class: 'btn btn-remove remove-row', method: :delete, remote: true, data: {confirm: "Remove this label? Are you sure?"}
+      = link_to 'Edit', edit_namespace_project_label_path(@project.namespace, @project, label), class: 'btn btn-sm'
+      = link_to 'Remove', namespace_project_label_path(@project.namespace, @project, label), class: 'btn btn-sm btn-remove remove-row', method: :delete, remote: true, data: {confirm: "Remove this label? Are you sure?"}