Simplify hiding/showing progress bar type field

With a parent element for just input and label, there aren't conflicts
with the globalize tabs code anymore.

app/assets/javascripts/forms.js.coffee

@@ -34,9 +34,9 @@ App.Forms =
         title_field = $("[name^='progress_bar'][name$='[title]']").parent()
 
         if this.value == "primary"
-          title_field.addClass("hide")
+          title_field.hide()
         else
-          title_field.removeClass("hide")
+          title_field.show()
 
     $("[name='progress_bar[kind]']").change()
 

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

@@ -6,11 +6,11 @@
     <%= f.enum_select :kind %>
   </div>
 
-  <div class="small-12 medium-6">
-    <%= f.translatable_fields do |translations_form| %>
+  <%= f.translatable_fields do |translations_form| %>
+    <div class="small-12 medium-6">
       <%= translations_form.text_field :title %>
-    <% end %>
-  </div>
+    </div>
+  <% end %>
 
   <% progress_options = { min: ProgressBar::RANGE.min, max: ProgressBar::RANGE.max, step: 1 } %>
   <div class="small-12 medium-6 large-2">