Supplier section management improvements

app/controllers/suppliers/sections_controller.rb

@@ -132,10 +132,10 @@ module Suppliers
         table = Table.new(number: table_number)
         table.supplier = current_supplier
         table.section = @section
-        table.save
       end
       @section.arrange_tables_in_grid
-      render json: {ok: true}
+      table_json =  ActiveModel::ArraySerializer.new(@section.tables, each_serializer: SupplierTableSerializer, root: false).as_json
+      render json: {tables: table_json}
     end
 
     # POST /sections/1/arrange_tables {number_start: 1423, number_end: 234234}