Comment 44 for bug 501393

(In reply to comment #26)
> As a note, even Ubuntu's implementation supports actions, it's just not "as
> shiny" right now. We should let the caller decide whether they want a callback
> or not.

while this is true, it doesn't mean that those actions should be used.

In general, apps should not add actions if there is no "actions" capability announced by the server through:

/**
 * Returns the capabilities of the notification server.
 *
 * @return A list of capability strings. These strings must be freed.
 */
GList *notify_get_server_caps(void);

So what we can do is two things (or maybe both):

1. omit the actions in system alerts service if the there is no actions support available
2. add a supportsActions method to system alerts component to allow the caller to decide on its own what to do in case there are no actions available on system.