Feature request: set headfree reference whenever you want

[joihn]

I want to use headfree as a "come home" like feature, when I don't know where the head of the quad is.

I want to set the "head" when I want via a manual button (I push it when I take off for example),

Then, If I'm totally lost, I just activate headfree, and then I know that the head is where I previously configurated it.

Is it possible to do this ?

[AJ-Acevedo]

This feature would be really helpful for LOS flying too.