Comment 7 for bug 404658

mpt's comment (https://bugs.launchpad.net/ubuntu/+source/notify-osd/+bug/404658/comments/2) says that "None of the synchronous notifications use text", which is true for current notifications, but looking at the specification (https://wiki.ubuntu.com/NotifyOSD) I haven't found a requirements that Synchronous notification should never have text. In which case, we need to define a behaviour for sync notifications that do.