Allow AUs to be selected

macrovision.js

@@ -33,6 +33,7 @@ const unitChoices = {
         "feet",
         "stories",
         "miles",
+        "AUs",
         "lightyears",
         "parsecs",
     ],

presets/characters.js

@@ -15,6 +15,9 @@ math.createUnit("lightyears", {
 math.createUnit("AU", {
     definition: "149597870700 meters"
 })
+math.createUnit("AUs", {
+    definition: "149597870700 meters"
+})
 function makeCharacter(name, author, viewInfo, defaultSizes, defaultSize, extraInfo) {
     if (extraInfo === undefined) {
         extraInfo = {}