Feature Request: Power-On-Demand Mode

[wolfpackmars2]

POD mode.

An alternative mode where the iron is powered while pressing one of the buttons and shuts off when the button is released. The irons heat up quickly enough that this mode should be bearable for small soldering jobs. When pressed, the iron will wake and begin heating to it's set temp and then maintains that temp until the button is released, where the iron will power down.

In lieu of an audible alert when the set temp has been reached, flash "READY" in large print of the OLED.

To modify configuration while in this mode, press and hold both buttons for 3s, where the controller will wake and allow changing temperature/Mode/other parameters without heating the iron.

Can switch between Power-On-Demand/Standard modes in config.

Motivation: Increase efficiency when running iron from battery power.

I admit I have just received my first unit and haven't had much time with it, so I'm not familiar with the current features and operation. I DID want to document this thought while it was fresh in my mind.