Ultimate Extruder Calibration Test with modifier

This is essentially a refinement of the code for the Ultimate Extruder Calibration Test.

Cleaned up alot of redundant code in the math and also fixed a few of the calculations so the variables would work correctly if changed from default settings.

Why you ask, well thats where the second part comes in.
I've added a bit of code that lets you only print the bridges that fail after the first run making it quicker to calibrate settings, as ths object progressivly gets smaller, requiring less