[gnome-shell] Add translator comment for button label

[Wouter Bolsterlee <wbolster src gnome org>]

commit 61b8af2252926f7171fb3cf80a6626c15a16af44
Author: Wouter Bolsterlee <wbolster gnome org>
Date:   Sat Oct 8 01:50:20 2011 +0200

    Add translator comment for button label

 js/ui/telepathyClient.js |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/telepathyClient.js b/js/ui/telepathyClient.js
index a0a5823..3315366 100644
--- a/js/ui/telepathyClient.js
+++ b/js/ui/telepathyClient.js
@@ -1202,6 +1202,7 @@ AudioVideoNotification.prototype = {
         this.setResident(true);
 
         this.addButton('reject', _("Reject"));
+        /* translators: this is a button label (verb), not a noun */
         this.addButton('answer', _("Answer"));
 
         this.connect('action-invoked', Lang.bind(this, function(self, action) {