Fix: Correct mistake in ZPL sensor configs

[Cellivar]

Apparently my testing of ZPL sensor levels wasn't thorough enough, I needed to do more digging into various eras of manuals to sort out what was going wrong with setting some printer's values. This was only an issue if you were specifically setting sensors manually.

I dragged a bunch of different information into the docs for this one because I had to re-learn some of these pieces for the third time.

This also fixed a couple of issues with the demo UI.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	61.61%	2868 / 4655
🔵	Statements	61.61%	2868 / 4655
🔵	Functions	49.1%	193 / 393
🔵	Branches	75.32%	522 / 693

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/Languages/Zpl/CmdHostConfig.ts	96.19%	93.27%	83.33%	96.19%	55-56, 59-61, 66-67, 223-225
src/Languages/Zpl/CmdSetSensorCalibration.ts	10.44%	50%	33.33%	10.44%	7-48, 56-77
src/Languages/Zpl/CmdXmlQuery.ts	89.11%	44.04%	95%	89.11%	57-61, 79-82, 85-89, 95-99, 104-105, 107-108, 139-143, 218, 220, 245, 332
src/Languages/Zpl/Config.ts	2.04%	0%	0%	2.04%	45-156

Generated in workflow #156 for commit c1bd958 by the Vitest Coverage Report Action