Extract registrar controller translations in admin area

#279

app/controllers/admin/registrars_controller.rb

@@ -23,10 +23,10 @@ class Admin::RegistrarsController < AdminController
         @registrar.accounts.create!(account_type: Account::CASH, currency: 'EUR')
       end
 
-      flash[:notice] = I18n.t('registrar_added')
+      flash[:notice] = t('.created')
       redirect_to [:admin, @registrar]
     rescue ActiveRecord::RecordInvalid
-      flash.now[:alert] = I18n.t('failed_to_add_registrar')
+      flash.now[:alert] = t('.not_created')
       render 'new'
     end
   end
@@ -35,10 +35,10 @@ class Admin::RegistrarsController < AdminController
 
   def update
     if @registrar.update(registrar_params)
-      flash[:notice] = I18n.t('registrar_updated')
+      flash[:notice] = t('.updated')
       redirect_to [:admin, @registrar]
     else
-      flash.now[:alert] = I18n.t('failed_to_update_registrar')
+      flash.now[:alert] = t('.not_updated')
       render 'edit'
     end
   end

app/views/admin/registrars/_form.haml

@@ -75,7 +75,7 @@
     .col-md-8
       .panel.panel-default
         .panel-heading.clearfix
-          .pull-left= t(:misc)
+          .pull-left= t('.misc')
         .panel-body
           .form-group
             .col-md-4.control-label
@@ -91,4 +91,4 @@
   %hr
   .row
     .col-md-8.text-right
-      = button_tag(t(:save), class: 'btn btn-primary')
+      = button_tag(t(".#{f.object.new_record? ? 'create' : 'update'}_btn"), class: 'btn btn-success')

app/views/admin/registrars/index.haml

@@ -1,5 +1,5 @@
 - content_for :actions do
-  = link_to(t(:new), new_admin_registrar_path, class: 'btn btn-primary')
+  = link_to(t('.new_btn'), new_admin_registrar_path, class: 'btn btn-primary')
 = render 'shared/title', name: t(:registrars)
 
 .row