fix bugs for i18n_variable in page and home

app/views/admin/pages/_form.html.erb

@@ -2,7 +2,7 @@
 
 <p>
 <%= f.label :name, t('admin.name') %>
-<% if @page.parent_id.nil? %>
+<% if @page.parent_id.nil? || @page.parent_id.empty? %>
   <%= f.text_field :name, :class => 'text', :value => 'home', :disabled => true %>
   <%= f.hidden_field :name, :value => 'home' %>
 <% else %>
@@ -13,8 +13,8 @@
 
 <% @site_valid_locales.each do |locale| %>
   <p>
-  <%= label_tag "#{f}[title]", "#{t('admin.title')} #{locale}" %>
-  <%= text_field_tag "#{f}[i18n_variable][#{locale}]", (@i18n_variable[locale] if @i18n_variable), :class => 'text' %>
+  <%= label_tag "page[title]", "#{t('admin.title')} #{locale}" %>
+  <%= text_field_tag "page[i18n_variable][#{locale}]", (@i18n_variable[locale] if @i18n_variable), :class => 'text' %>
   </p>
 <% end %>