fix config issue with nested hash

lib/foodsoft_config.rb

@@ -249,7 +249,9 @@ class FoodsoftConfig
     # Normalize value recursively (which can be entered as strings, but we want to store it properly)
     def normalize_value(value)
       value = value.map(&:normalize_value) if value.is_a? Array
-      value = Hash[ value.to_a.map{|a| [a[0], normalize_value(a[1])]} ] if value.is_a? Hash
+      if value.is_a? Hash
+        value = ActiveSupport::HashWithIndifferentAccess[ value.to_a.map{|a| [a[0], normalize_value(a[1])]} ]
+      end
       case value
         when 'true' then true
         when 'false' then false

spec/integration/config_spec.rb

@@ -2,6 +2,7 @@ require_relative '../spec_helper'
 
 describe 'admin/configs', type: :feature do
   let(:name) { Faker::Lorem.words(rand(2..4)).join(' ') }
+  let(:email) { Faker::Internet.email }
 
   describe type: :feature, js: true do
     let(:admin) { create :admin }
@@ -35,6 +36,16 @@ describe 'admin/configs', type: :feature do
       expect(get_full_config).to eq orig_values
     end
 
+    it 'can modify a nested value' do
+      visit admin_config_path
+      fill_in 'config_contact_email', with: email
+      within('form.config') do
+        find('input[type="submit"]').click
+        expect(find_field('config_contact_email').value).to eq email
+      end
+      expect(FoodsoftConfig[:contact][:email]).to eq email
+    end
+
     def get_full_config
       cfg = FoodsoftConfig.to_hash.deep_dup
       cfg.each {|k,v| v.reject! {|k,v| v.blank?} if v.is_a? Hash}