power button on panel

[Thomas Pfeiffer]

> I agree that we need to change the icons to match Plasma Active's theme.
I am not a designer, who can I poke to help me with this?

I've asked the Oxygen team for help. Martin Klapetek has asked a designer
friend if she's interested to help us but is still waiting for response.
If she won't help, Eugene Trounev offered to help us.

So with the next update we will surely be able ship shiny new PA-themed
icons (also for SLC).