What would this code do if the device notifier is expanded but on the desktop?

In D10591#207905, @davidedmundson wrote:

What would this code do if the device notifier is expanded but on the desktop?

giving desktop window focus, which means we should also either check window flags or the applet formfactor... (tough i would still like a smarter solution)

another way, may be adding a default kwin rule or script which lets every plasma window go trough

If we were to do this, we need to first make Device Notifier not freak out when you have a wonky USB cable.

An alternate idea:

• we open it without giging focus
• the current show time is 5 seconds
• after 2 seconds (1 would be enough?) we check if there was user activity with kidletime
• if there was activity, if the notifier doesn't contain the cursor or isn't focused, then close it
• otherwise the usual 5 seconds