adds banner creation/edition/deletion specs

refactors admin banners specs

config/locales/admin.en.yml

@@ -11,23 +11,23 @@ en:
       unmark_featured: Unmark featured
     banners:
       index:
-        title: Post banners
-        create: Create  a banner
-        edit: Edit a banner
-        delete: Delete a banner
+        title: Banners
+        create: Create banner
+        edit: Edit banner
+        delete: Delete banner
         filters:
-          all: Todos
-          with_active: Actives
-          with_inactive: Inactives
+          all: All
+          with_active: Active
+          with_inactive: Inactive
       banner:
         title: Title
         description:  Description
-        target_url:  Link 
-        style: Style 
-        image: Image 
+        target_url:  Link
+        style: Style
+        image: Image
         post_started_at: Post started at
-        post_ended_at: Post ended at 
-      edit: 
+        post_ended_at: Post ended at
+      edit:
         back: Back
         editing: Edit banner
         form:
@@ -39,7 +39,7 @@ en:
           error:
             one: "prevented this banner from being saved"
             other: 'prevented this banner from being saved'
-      new: 
+      new:
         back: Back
         creating: Create banner
     activity:
@@ -92,7 +92,7 @@ en:
         user_not_found: User not found
     menu:
       activity: Moderator activity
-      banner: Publish banner
+      banner: Manage banners
       debate_topics: Debate topics
       hidden_comments: Hidden comments
       hidden_debates: Hidden debates
@@ -190,7 +190,7 @@ en:
         updated: Value updated
       index:
         banners: Estilos de banners
-        banner_imgs: Imágenes para los banners      
+        banner_imgs: Imágenes para los banners
         title: Configuration settings
         update_setting: Update
         feature_flags: Features