Added comment on unit abbreviation.

gui/src/components/units/Unit.js

@@ -84,6 +84,7 @@ export class Unit {
     let nDen = 0
 
     function getName(unit) {
+      // For now, we forcibly abbreviate the base dimensionless unit
       if (unit.name === DIMENSIONLESS) return ''
       return abbreviate
         ? unitToAbbreviationMap?.[unit.name] || unit.name