Refactor gui files

[Ralim]

This is purely a code cleanup change; splitting up GUI thread to make edits and reviews easier.

[discip]

@Ralim
I know it is not the right place.
But please help me at finding out which part I need to swap, to make the TS80P show the right temperature again.

Last time you told me a sign for damage (after having fed 20V instead of 12V into my device) would be a temperature drift.

I left the TS80P sit on the desk to let it acclimate before calibration. But even after some time, the difference displayed in the debug menu was ~6°C [Tip C 20 and Han C 26.0].

[Ralim]

Best would be to open a discussion for this; if you can. (I suspect it may be a long chat)
But TL;DR would be to figure out which is wrong (raw tip reading OR handle temp).
If its the handle temp its concerning as that circuit should just be a resistor and an NTC resistor
More likely its the raw tip and the biggest suspect is the op-amp that measures the tip temperature

[discip]

One thing I've wanted to know for some time is:

In what unit is this difference measured (< 10):

IronOS/source/Core/Threads/GUIThread.cpp

Line 101 in 30f1840

if (!isTipDisconnected() && (TipThermoModel::getTipInC() - getHandleTemperature(0) / 10) < 10) {

That should be in °C, right?

I am asking, because the calibration is not performed even though the difference is not close to 10°C.

Or should we check against the absolute value of the observed difference?

[Ralim]

Ah we probably should abs() that; getHandleTemp is in X10C (so the /10 to make it into C)

[discip]

Created a PR already. 😁