Use plural form for attachment and note label

sao/src/tab.js

@@ -1521,7 +1521,9 @@
             if (count > 99) {
                 badge = '99+';
             }
-            var title= Sao.i18n.gettext("Attachment (%1)", count);
+            var title= Sao.i18n.ngettext(
+                "Attachment (%1)", "Attachments (%1)",
+                Math.max(count, 1), count);
             update('attach', title, badge, 1);
 
             count = resources.note_count || 0;
@@ -1540,7 +1542,9 @@
                     badge = unread + '/' + badge;
                 }
             }
-            title = Sao.i18n.gettext("Note (%1/%2)", unread, count);
+            title = Sao.i18n.ngettext(
+                "Note (%1/%2)", "Notes (%1/%2)",
+                Math.max(count, 1), unread, count);
             update('note', title, badge, color);
         },
         record_message: function(position, size, max_size, record_id) {

tryton/tryton/gui/window/form.py

@@ -308,7 +308,9 @@ class Form(TabContent):
 
         attachment_count = resources.get('attachment_count', 0)
         badge = 1 if attachment_count else None
-        label = _("Attachment (%s)") % attachment_count
+        label = N_(
+            "Attachment (%d)", "Attachments (%d)",
+            max(attachment_count, 1)) % attachment_count
         update('attach', label, 'tryton-attach', badge)
 
         note_count = resources.get('note_count', 0)
@@ -319,7 +321,8 @@ class Form(TabContent):
             badge = 1
         else:
             badge = None
-        label = _("Note (%d/%d)") % (note_unread, note_count)
+        label = N_("Note (%d/%d)", "Notes (%d/%d",
+            max(note_count, 1)) % (note_unread, note_count)
         update('note', label, 'tryton-note', badge)
 
     def sig_switch(self, widget=None):