Temp sensor (rings) should floor at ambient

[OpenBagTwo]

Currently I have minimon set to show CPU and GPU temps as ring graphs, and it's always distracting and momentarily alarming when I notice the rings are 35-45% of full at idle, e.g.

As a dirty hack, I could always hardcode

minimon-applet/src/sensors/cputemp.rs

Lines 297 to 299 in d917a5c

	let percentage: u8 = latest.round().clamp(0.0, 100.0) as u8;
	crate::svg_graph::ring(&value, percentage, None, &self.svg_colors)

to read:

 let percentage: u8 = ((latest - 21) / .79).round().clamp(0.0, 100.0) as u8;

but I'd much prefer to set ambient and critical temps in my config.

[CarsonBurke]

I think this makes sense as a setting.

[Hyperchaotic]

If floor is 30C the ring would be empty at 30, would it scale so it was full at max/100C?

[OpenBagTwo]

Yep. That's what I'd like. Or theoretically to set a custom Tmax, since newer chips don't throttle at 100C.

[CarsonBurke]

If floor is 30C the ring would be empty at 30, would it scale so it was full at max/100C?

@Hyperchaotic
My PR has this.