gossip shouldn't use notifications with actions

Binary package hint: gossip

When a contact comes online, a notification bubble appears containing a “Chat” button, though clicking anywhere else in the bubble does the same as clicking the button. The actions should be made conditional on whether the notification server supports actions.

When someone adds you to their buddy list, a notification bubble appears that, when clicked, brings up the subscription request dialog.

When a new message arrives, a notification bubble appears containing a “Show” button, though clicking anywhere else in the bubble does the same as clicking the button. The actions should be made conditional on whether the notification server supports actions.