Use human attribute name on cards table

We were defining the same texts in three places: admin.homepage.cards,
admin.site_customization.pages.cards and activerecord attributes.

app/views/admin/homepage/_cards.html.erb

@@ -1,9 +1,9 @@
 <table>
   <thead>
     <tr>
-      <th><%= t("admin.homepage.cards.title") %></th>
-      <th class="small-4"><%= t("admin.homepage.cards.description") %></th>
-      <th><%= t("admin.homepage.cards.link_text") %> / <%= t("admin.homepage.cards.link_url") %></th>
+      <th><%= Widget::Card.human_attribute_name(:title) %></th>
+      <th class="small-4"><%= Widget::Card.human_attribute_name(:description) %></th>
+      <th><%= Widget::Card.human_attribute_name(:link_text) %> / <%= Widget::Card.human_attribute_name(:link_url) %></th>
       <th><%= t("admin.shared.image") %></th>
       <th class="small-3"><%= t("admin.shared.actions") %></th>
     </tr>

app/views/admin/site_customization/cards/_cards.html.erb

@@ -1,9 +1,9 @@
 <table>
   <thead>
     <tr>
-      <th><%= t("admin.site_customization.pages.cards.title") %></th>
-      <th class="small-4"><%= t("admin.site_customization.pages.cards.description") %></th>
-      <th><%= t("admin.site_customization.pages.cards.link_text") %> / <%= t("admin.site_customization.pages.cards.link_url") %></th>
+      <th><%= Widget::Card.human_attribute_name(:title) %></th>
+      <th class="small-4"><%= Widget::Card.human_attribute_name(:description) %></th>
+      <th><%= Widget::Card.human_attribute_name(:link_text) %> / <%= Widget::Card.human_attribute_name(:link_url) %></th>
       <th><%= t("admin.shared.image") %></th>
       <th class="small-2"><%= t("admin.shared.actions") %></th>
     </tr>

config/locales/en/admin.yml

@@ -1519,10 +1519,6 @@ en:
           cards_title: cards
           create_card: Create card
           no_cards: There are no cards.
-          title: Title
-          description: Description
-          link_text: Link text
-          link_url: Link URL
           columns_help: "Width of the card in number of columns. On mobile screens it's always a width of 100%."
           create:
             notice: "Card created successfully!"
@@ -1539,11 +1535,6 @@ en:
       cards_title: Cards
       create_card: Create card
       no_cards: There are no cards.
-      cards:
-        title: Title
-        description: Description
-        link_text: Link text
-        link_url: Link URL
       feeds:
         proposals: Proposals
         debates: Debates

config/locales/es/admin.yml

@@ -1518,10 +1518,6 @@ es:
           cards_title: tarjetas
           create_card: Crear tarjeta
           no_cards: No hay tarjetas.
-          title: Título
-          description: Descripción
-          link_text: Texto del enlace
-          link_url: URL del enlace
           columns_help: "Ancho de la tarjeta en número de columnas. En pantallas móviles siempre es un ancho del 100%."
           create:
             notice: "¡Tarjeta creada con éxito!"
@@ -1538,11 +1534,6 @@ es:
       cards_title: Tarjetas
       create_card: Crear tarjeta
       no_cards: No hay tarjetas.
-      cards:
-        title: Título
-        description: Descripción
-        link_text: Texto del enlace
-        link_url: URL del enlace
       feeds:
         proposals: Propuestas
         debates: Debates