XdgAbstractOutput.::name is set to "HDMI-0", "HDMI-1" and then following a similar() behaviour is changed so that it matches the X11
pattern on nested platforms.behaviour, As per examples in the specshowing an identifier like "HDMI-0".
XdgOutput.name is set to this name.
XdgOutput.description is currently set to the manufacturer name and
model, but it's not exposed to Qt so we probably don't care too much.
This should fix plasmashell changing applets when switching between X11
and wayland.