Add "Units Converter"/"Scale Calculator" toolbar

[ghost]

Add "Units Converter" ("Scale Calculator", etc.) toolbar as dockable widget.

UI should be similar to this one

• http://studs.sariel.pl

REFERENCES

• http://brickwiki.info/wiki/LDU
• http://thebrickblogger.com/2014/09/lego-unit-scale-converters-handy-tools/
• http://sariel.pl/down/scaling_tutorial.zip
• http://brickarchitect.com/scale/

[ghost]

Maybe this spreadsheet would be useful too

• https://docs.google.com/spreadsheets/d/1UKP13-fEiShvChxOy1pCrlV4W_47rUEnwV7xOgUQWBc/edit?usp=sharing
  • https://forums.ldraw.org/thread-23311.html