Feature freeze exception (or not) for "Advanced Power Settings" QML port

[David Edmundson]

I don't want to set a precedent for many others.
I would have rejected this if the MR was only just opened, or if this
wasn't a KCM section that's specifically titled "Advanced settings" or
we were having this discussion later.

But given it closes some bugs, I think it's reasonable to go ahead.
Wait one more day for another ack (or nack!) then ship it.

David