Use polymorphic routes to manage cards

We use a different logic to load the card depending on the controller
we're using, and then share the rest of the code. This way we simplify
the code a bit, since we don't have to check for the page_id parameter.

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

@@ -17,8 +17,6 @@
     <% end %>
   </td>
   <td>
-    <%= render Admin::TableActionsComponent.new(card,
-      edit_path: edit_admin_widget_card_path(card, page_id: params[:page_id])
-    ) %>
+    <%= render Admin::TableActionsComponent.new(card) %>
   </td>
 </tr>

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

@@ -8,7 +8,7 @@
 
   <div class="float-right">
     <%= link_to t("admin.site_customization.pages.cards.create_card"),
-        new_admin_widget_card_path(page_id: params[:page_id]), class: "button" %>
+                new_admin_site_customization_page_widget_card_path(@page), class: "button" %>
   </div>
 
   <% if @cards.present? %>

app/views/admin/site_customization/pages/index.html.erb

@@ -30,7 +30,7 @@
         <td>
           <%= render Admin::TableActionsComponent.new(page) do |actions| %>
             <%= actions.link_to t("admin.site_customization.pages.page.see_cards"),
-                                admin_site_customization_page_cards_path(page),
+                                admin_site_customization_page_widget_cards_path(page),
                                 class: "cards-link" %>
 
             <% if page.status == "published" %>