new_editor: close startup screenshot ownership

new_editor/app/Bootstrap/Application.cpp

@@ -5,6 +5,7 @@
 #include "Platform/Win32/EditorWindowManager.h"
 #include "Platform/Win32/EditorWindow.h"
 #include "Platform/Win32/Win32SystemInteractionHost.h"
+#include "Support/EnvironmentFlags.h"
 #include "Support/ExecutablePath.h"
 
 #include <XCEditor/Foundation/UIEditorRuntimeTrace.h>
@@ -144,7 +145,8 @@ bool Application::Initialize(HINSTANCE hInstance, int nCmdShow) {
     createParams.title = kWindowTitle;
     createParams.showCommand = nCmdShow;
     createParams.primary = true;
-    createParams.autoCaptureOnStartup = true;
+    createParams.autoCaptureOnStartup =
+        App::IsEnvironmentFlagEnabled("XCUI_AUTO_CAPTURE_ON_STARTUP");
     if (m_windowManager->CreateEditorWindow(
             m_editorContext->BuildWorkspaceController(),
             createParams) == nullptr) {