made 'mark all as read' translatable

app/views/notifications/index.html.haml

@@ -38,7 +38,7 @@
     = t('.notifications')
 .span-13.last.left
   .button.mark_all_read
-    = link_to "Mark All as Read", "#"
+    = link_to t('.mark_all_as_read'), "#"
 
 .span-24.last
   %ul.stream.notifications

config/locales/diaspora/en.yml

@@ -201,6 +201,7 @@ en:
       deleted: 'deleted'
       index:
         notifications: "Notifications"
+        mark_all_as_read: "Mark All as Read"
   users:
       edit:
           export_data: "Export Data"