Remember Display Length & Mass when Changing Unit System

Blender projects should remember the display length and mass per Unit System.

I am working on a project that requires me to toggle between millimeters and inches often.

Each time I set the Unit System to Metric, the Length changes to Meters. Blender fogets I had it set to Millimers.

Each time I set the Unit System to Imperial the Length changes to Feet. Blender forgets I had it set to Inches.