More units UI work

src/pages/tools/number/generic-calc/data/wire_voltage_drop.ts

@@ -45,7 +45,7 @@ const voltagedropinwire: GenericCalcType = {
     {
       name: 'A',
       title: 'Wire Area',
-      unit: 'mm',
+      unit: 'mm2',
       default: 1
     },
 

src/pages/tools/number/generic-calc/index.tsx

@@ -252,6 +252,10 @@ export default async function makeTool(
                             values.outputVariable === variable.name ||
                             valsBoundToPreset[variable.name] !== undefined
                           }
+                          disableChangingUnit={
+                            values.outputVariable === variable.name ||
+                            valsBoundToPreset[variable.name] !== undefined
+                          }
                           onOwnChange={(val) =>
                             updateVarField(
                               variable.name,