Widgets.js: stop using charCodeAt

It is not a supported function in Nashorn.

Widgets.js:48 TypeError: oCharacter.charCodeAt is not a function
	at jdk.nashorn.internal.runtime.ECMAErrors.error(ECMAErrors.java:57)
	at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:213)
	at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:185)
	at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:172)
	at jdk.nashorn.internal.runtime.Undefined.lookup(Undefined.java:102)
	at jdk.nashorn.internal.runtime.linker.NashornLinker.getGuardedInvocation(NashornLinker.java:106)
	at jdk.nashorn.internal.runtime.linker.NashornLinker.getGuardedInvocation(NashornLinker.java:98)
	at jdk.internal.dynalink.support.CompositeTypeBasedGuardingDynamicLinker.getGuardedInvocation(CompositeTypeBasedGuardingDynamicLinker.java:176)
	at jdk.internal.dynalink.support.CompositeGuardingDynamicLinker.getGuardedInvocation(CompositeGuardingDynamicLinker.java:124)
	at jdk.internal.dynalink.support.LinkerServicesImpl.getGuardedInvocation(LinkerServicesImpl.java:154)
	at jdk.internal.dynalink.DynamicLinker.relink(DynamicLinker.java:253)
	at jdk.nashorn.internal.scripts.Script$15$Widgets.:program(Widgets.js:48)
	at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:637)
	at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:494)
	at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:393)
	at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:449)
	at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:406)
	at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:402)
	at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:155)
	at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
	at org.scijava.script.ScriptModule.run(ScriptModule.java:157)
	at org.scijava.module.ModuleRunner.run(ModuleRunner.java:163)
	at org.scijava.module.ModuleRunner.call(ModuleRunner.java:124)
	at org.scijava.module.ModuleRunner.call(ModuleRunner.java:63)
	at org.scijava.thread.DefaultThreadService.lambda$wrap$2(DefaultThreadService.java:225)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:750)

Author: ctrueden

src/main/resources/script_templates/Intro/Widgets.js

@@ -35,7 +35,7 @@ sb.append("Widgets JavaScript results:\n");
 sb.append("\n");
 sb.append("\tboolean = " + pBoolean + "\n");
 sb.append("\tbyte = " + pByte + "\n");
-sb.append("\tchar = " + "'" + pChar + "' [" + pChar.charCodeAt(0) + "]\n");
+sb.append("\tchar = " + "'" + pChar + "'\n");
 sb.append("\tdouble = " + pDouble + "\n");
 sb.append("\tfloat = " + pFloat + "\n");
 sb.append("\tint = " + pInt + "\n");
@@ -45,8 +45,7 @@ sb.append("\tshort = " + pShort + "\n");
 sb.append("\n");
 sb.append("\tBoolean = " + oBoolean + "\n");
 sb.append("\tByte = " + oByte + "\n");
-oCharValue = oCharacter == null ? "null" : "" + oCharacter.charCodeAt(0);
-sb.append("\tCharacter = " + "'" + oCharacter + "' [" + oCharValue + "]\n");
+sb.append("\tCharacter = " + "'" + oCharacter + "'\n");
 sb.append("\tDouble = " + oDouble + "\n");
 sb.append("\tFloat = " + oFloat + "\n");
 sb.append("\tInteger = " + oInteger + "\n");