11200: add explanations

app/helpers/admin/products_helper.rb

@@ -41,6 +41,8 @@ module Admin
       "#{admin_products_path}#{url_filters.empty? ? '' : "#?#{url_filters.to_query}"}"
     end
 
+    # if user hasn't saved any preferences on products page and there's only one producer;
+    # we need to hide producer column
     def hide_producer_column?(producer_options)
       spree_current_user.column_preferences.products.empty? && producer_options.one?
     end

spec/system/admin/products_v3/create_spec.rb

@@ -7,6 +7,8 @@ RSpec.describe 'As an enterprise user, I can manage my products' do
   include WebHelper
 
   let!(:supplier) { create(:supplier_enterprise) }
+  # Creating another producer such that producer column is visible
+  # otherwise on one producer, it's hidden by default
   let!(:supplier2) { create(:supplier_enterprise) }
   let!(:taxon) { create(:taxon) }