HTML5: Fix build after #52742

Fixes #58172.

platform/javascript/javascript_main.cpp

@@ -28,6 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
+#include "core/config/engine.h"
 #include "core/io/resource_loader.h"
 #include "main/main.h"
 #include "platform/javascript/display_server_javascript.h"
@@ -94,7 +95,7 @@ extern EMSCRIPTEN_KEEPALIVE int godot_js_main(int argc, char *argv[]) {
 	Main::start();
 	os->get_main_loop()->initialize();
 #ifdef TOOLS_ENABLED
-	if (Main::is_project_manager() && FileAccess::exists("/tmp/preload.zip")) {
+	if (Engine::get_singleton()->is_project_manager_hint() && FileAccess::exists("/tmp/preload.zip")) {
 		PackedStringArray ps;
 		ps.push_back("/tmp/preload.zip");
 		os->get_main_loop()->emit_signal(SNAME("files_dropped"), ps, -1);