mostrar cuáles son los filtros actuales y poder removerlos

además, crear una sección de notas al pie con definiciones disponibles
para lectores de pantalla.  (no quiere decir que sean completas, `title`
solo funciona con usuaries de mouse)

app/views/posts/index.haml

@@ -60,6 +60,16 @@
           - @site.locales.each do |locale|
             = link_to t("locales.#{locale}.name"), site_posts_path(@site, **@filter_params.merge(locale: locale)),
               class: "mr-2 mt-2 mb-2 #{locale == @locale ? 'active font-weight-bold' : ''}"
+    .pl-2-plus
+      - @filter_params.each do |param, value|
+        - if param == 'layout'
+          - value = @site.layouts[value.to_sym].humanized_name
+        = link_to site_posts_path(@site, **@filter_params.reject { |k, _| k == param }),
+          class: 'btn btn-secondary btn-sm',
+          title: t('posts.remove_filter_help', filter: value),
+          aria: { labelledby: "help-filter-#{param}" } do
+          = value
+          ×
     - if @posts.empty?
       %h2= t('posts.empty')
     - else
@@ -121,3 +131,9 @@
                       = link_to t('posts.edit'), edit_site_post_path(@site, post.path), class: 'btn btn-block'
                     - if @usuarie || policy(post).destroy?
                       = link_to t('posts.destroy'), site_post_path(@site, post.path), class: 'btn btn-block', method: :delete, data: { confirm: t('posts.confirm_destroy') }
+
+#footnotes{ hidden: true }
+  - @filter_params.each do |param, value|
+    - if param == 'layout'
+      - value = @site.layouts[value.to_sym].humanized_name
+    %label{ id: "help-filter-#{param}" }= t('posts.remove_filter_help', filter: value)

config/locales/en.yml

@@ -451,6 +451,7 @@ en:
     add: 'Add'
     filter: 'Filter'
     remove_filter: 'Back'
+    remove_filter_help: 'Remove the filter: %{filter}'
     categories: 'Everything'
     index: 'Posts'
     edit: 'Edit'

config/locales/es.yml

@@ -515,6 +515,7 @@ es:
     add: 'Agregar'
     filter: 'Filtrar'
     remove_filter: 'Volver'
+    remove_filter_help: 'Quitar este filtro: %{filter}'
     index: 'Artículos'
     edit: 'Editar'
     preview: