add auto-highlighting of selected/updated code

tests/unit/stubs/SelectedScriptStub.ts

@@ -0,0 +1,8 @@
+import { SelectedScript } from '@/application/State/Selection/SelectedScript';
+import { ScriptStub } from './ScriptStub';
+
+export class SelectedScriptStub extends SelectedScript {
+    constructor(id: string, revert = false) {
+        super(new ScriptStub(id), revert);
+    }
+}