Add the index to moderate the notifications

Add the index for moderating the notifications. The tranlations needed
have also been added, along with the JS to make it disappear at that moment.

config/locales/en/moderation.yml

@@ -68,6 +68,25 @@ en:
           created_at: Most recent
           flags: Most flagged
         title: Proposals
+    proposal_notifications:
+      index:
+        block_authors: Block authors
+        confirm: Are you sure?
+        filter: Filter
+        filters:
+          all: All
+          pending_review: Pending review
+          ignored: Mark as viewed
+        headers:
+          moderate: Moderate
+          proposal_notification: Proposal notification
+        hide_proposal_notifications: Hide proposals
+        ignore_flags: Mark as viewed
+        order: Order by
+        orders:
+          created_at: Most recent
+          moderated: Moderated
+        title: Proposal notifications
     users:
       index:
         hidden: Blocked

config/locales/es/moderation.yml

@@ -68,6 +68,25 @@ es:
           created_at: Más recientes
           flags: Más denunciadas
         title: Propuestas
+    proposal_notifications:
+      index:
+        block_authors: Bloquear autores
+        confirm: '¿Estás seguro?'
+        filter: Filtro
+        filters:
+          all: Todas
+          pending_review: Pendientes de revisión
+          ignored: Marcadas como revisadas
+        headers:
+          moderate: Moderar
+          proposal_notification: Notificación de propuesta
+        hide_proposal_notifications: Ocultar notificaciones
+        ignore_flags: Marcar como revisadas
+        order: Ordenar por
+        orders:
+          created_at: Más recientes
+          moderated: Moderadas
+        title: Notificaciones de propuestas
     users:
       index:
         hidden: Bloqueado