System Information
Operating system: Windows10
Graphics card: GTX970M

Blender Version
Broken: blender-2.80rc1-windows64
(example: 2.79b release)
(example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen)
Worked: (optional)

Short description of error
measureit used for arc, does not respect the units (it had to say 12mm and say 12000mm)

Exact steps for others to reproduce the error
for example "https://www.blendernation.com/2018/12/30/blender-2-8-blueprint-creation-with-measureit-addon/#prettyPhoto"