Subgroup, organizer changes will redirect with anchor

app/controllers/activities_controller.rb

     end
 
     flash_message(:success, I18n.t('activities.subgroups.edited'))
-    redirect_to edit_group_activity_path(@group, @activity)
+    redirect_to edit_group_activity_path(@group, @activity, anchor: 'subgroups')
   end
 
   # POST /activities/1/immediate_subgroups
     end
     flash_message(:success, message)
 
-    redirect_to edit_group_activity_path(@group, @activity)
+    redirect_to edit_group_activity_path(@group, @activity, anchor: 'organizers-add')
   end
 
   # PATCH/PUT /activities/1
 
     if @subgroup.save
       flash_message :success, I18n.t('activities.subgroups.created')
-      redirect_to edit_group_activity_path(@group, @activity)
+      redirect_to edit_group_activity_path(@group, @activity, anchor: 'subgroups-add')
     else
       flash_message :danger, I18n.t('activities.subgroups.create_failed')
       set_edit_parameters!
   def update_subgroup
     if @subgroup.update(subgroup_params)
       flash_message :success, I18n.t('activities.subgroups.updated')
-      redirect_to edit_group_activity_path(@group, @activity)
+      redirect_to edit_group_activity_path(@group, @activity, anchor: 'subgroups')
     else
       flash_message :danger, I18n.t('activities.subgroups.update_failed')
       set_edit_parameters!
   def destroy_subgroup
     @subgroup.destroy
     flash_message :success, I18n.t('activities.subgroups.destroyed')
-    redirect_to edit_group_activity_path(@group, @activity)
+    redirect_to edit_group_activity_path(@group, @activity, anchor: 'subgroups')
   end
 
   # PATCH/PUT /groups/:group_id/activities/:id/presence

app/views/activities/edit.html.haml

   = t 'activities.organizers.manage'
 .row
   .col-md-6
-    %h4
+    %h4#organizers-add
       = t 'activities.organizers.add'
     - if @non_organizers.count > 0
       = form_tag(group_activity_change_organizer_path(@group, @activity), method: 'post') do
       = t 'activities.organizers.no_non_organizers'
 
   .col-md-6
-    %h4
+    %h4#organizers-remove
       = t 'activities.organizers.remove'
     - if @organizers.count > 0
       = form_tag(group_activity_change_organizer_path(@group, @activity), method: 'post') do
 
 .row
   .col-md-6
-    %h4
+    %h4#subgroups-add
       = t 'activities.subgroups.create'
 
     = form_for(@subgroup, url: group_activity_create_subgroup_path(@group, @activity), method: :post) do |f|
 
       = f.submit t('activities.subgroups.create'), class: 'btn btn-success'
 
-  .col-md-6
+  .col-md-6#subgroups
     - if @activity.subgroups.blank?
       %p
         = t 'activities.subgroups.none'