ensure all ee-specific project repository settings panels remain open after form submission

app/views/projects/mirrors/_mirror_repos.html.haml

 - expanded = Rails.env.test?
 - protocols = Gitlab::UrlSanitizer::ALLOWED_SCHEMES.join('|')
 
-%section.settings.project-mirror-settings.js-mirror-settings.no-animate{ class: ('expanded' if expanded) }
+%section.settings.project-mirror-settings.js-mirror-settings.no-animate#js-mirror-settings{ class: ('expanded' if expanded) }
   .settings-header
     %h4= _('Mirroring repositories')
     %button.btn.js-settings-toggle

ee/app/controllers/ee/projects/mirrors_controller.rb

@@ -59,7 +59,7 @@ module EE
           flash[:notice] = "The repository is being updated..."
         end
 
-        redirect_to_repository_settings(project)
+        redirect_to_repository_settings(project, anchor: 'js-mirror-settings')
       end
 
       def mirror_params_attributes

ee/app/controllers/projects/push_rules_controller.rb

@@ -19,7 +19,7 @@ class Projects::PushRulesController < Projects::ApplicationController
       flash[:alert] = @push_rule.errors.full_messages.join(', ').html_safe
     end
 
-    redirect_to_repository_settings(@project)
+    redirect_to_repository_settings(@project, anchor: 'js-push-rules')
   end
 
   private