Currently this module only really allows for devices to be renamed, so we add a new
dialog that can be activated by right clicking on devices (i.e. sinks/sources).
This dialog allows you to enter a new name which will be set via the extension
provided by the device-manager module.
Future work will allow you to manage (i.e. rename, delete etc) offline devices too.
This abandons the combo box approach an instead partially reverts to the popup.
We now display a suffix after the stream title saying " on <device>" or " from <device>"
where the <device> part looks like a hyperlink and, when clicked, shows the popup to change the device.
If there is only one device available, we suppress the whole thing and thus avoid confusion.
Rafał Mużyło