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 commit adds a combo box for selecting ports.
Overall this implementation could have taken two paths:
* Implement port selection as combo box.
* Implement port selection as a button.
I went for the first option as is done in selecting card profiles over the
second method used for selecting devices for streams. This seems more like
how a config option should be presented as opposed to a runtime type thing.
I reworked the way this was done so we can easily re-enable this as I think it's clearer when it's inactive
(the difference between toggled and not toggled is pretty minor).
With this abstraction we could reset the tooltip etc. too.
Colin Guthrie