Fix backfill action and Geo Nodes button spacing

app/models/geo_node.rb

@@ -65,6 +65,12 @@ class GeoNode < ActiveRecord::Base
     self.primary? ? false : !oauth_application.present?
   end
 
+  def backfill_repositories
+    if Gitlab::Geo.enabled?
+      GeoScheduleBackfillWorker.perform_async(id) unless primary?
+    end
+  end
+
   private
 
   def url_helper_args
@@ -121,8 +127,4 @@ class GeoNode < ActiveRecord::Base
     self.system_hook.push_events = true
     self.system_hook.tag_push_events = true
   end
-
-  def backfill_repositories
-    GeoScheduleBackfillWorker.perform_async(id) unless primary?
-  end
 end

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

@@ -53,13 +53,13 @@
 
           .pull-right
             - if node.missing_oauth_application?
-              = link_to repair_admin_geo_node_path(node), method: :post, title: 'OAuth application is missing', class: 'btn btn-default, btn-sm' do
+              = link_to repair_admin_geo_node_path(node), method: :post, title: 'OAuth application is missing', class: 'btn btn-default btn-sm prepend-left-10' do
                 = icon('exclamation-triangle fw')
                 Repair authentication
             - unless node.primary?
-              = link_to backfill_repositories_admin_geo_node_path(node), method: :post, class: 'btn btn-primary btn-sm' do
+              = link_to backfill_repositories_admin_geo_node_path(node), method: :post, class: 'btn btn-primary btn-sm prepend-left-10' do
                 = icon 'map-signs'
                 Backfill all repositories
-            = link_to admin_geo_node_path(node), data: { confirm: 'Are you sure?' }, method: :delete, class: 'btn btn-remove btn-sm' do
+            = link_to admin_geo_node_path(node), data: { confirm: 'Are you sure?' }, method: :delete, class: 'btn btn-remove btn-sm prepend-left-10' do
               = icon 'trash'
               Remove