fx-compat: Scaffold: Fix indentation using spaces

chrome/content/scaffold/monaco/monaco.html

@@ -58,6 +58,8 @@
 					minimap: { enabled: false },
 					// Clicking links doesn't actually work, so disable them (for now)
 					links: false,
+					insertSpaces: false,
+					detectIndentation: false,
 					...params
 				});
 

chrome/content/scaffold/scaffold.js

@@ -271,10 +271,6 @@ var Scaffold = new function () {
 	this.initCodeEditor = async function () {
 		let monaco = _editors.codeGlobal, editor = _editors.code;
 
-		editor.getModel().updateOptions({
-			insertSpaces: false
-		});
-
 		editor.updateOptions({
 			lineNumbers: num => num + _linesOfMetadata - 1,
 		});