Do Not Expand Sim After Tutorial in Headless Mode

I considered putting this check inside expandSimulator so it no-oped if we're in headless mode, but I think this may still be used to see the file explorer in javascript mode, so I left that untouched for now.

webapp/src/app.tsx

@@ -4658,7 +4658,7 @@ export class ProjectView
                         return this.loadHeaderAsync(curr);
                     }).finally(() => {
                         core.hideLoading("leavingtutorial")
-                        if (this.state.collapseEditorTools) {
+                        if (this.state.collapseEditorTools && !pxt.appTarget.simulator.headless) {
                             this.expandSimulator();
                         }
                         this.postTutorialProgress();