Customisable snap-in machine controls in build preview.

[maddog7]

I like to see a snap in panel (perhaps inset into one corner of the 3d view) with user customisable buttons. The panel could be set to "on" every time the preview opens, an example of a simple config might be extruder temp, bed temp, emergency stop, home all.
It would just save having to open the entire machine control panel and the considerable real estate it occupies, each time you open the preview.
Cheers
D