Preload the list of projects from disk

def load_projects(self):
        """
        Preload the list of projects from disk
        """
        server_config = Config.instance().get_section_config("Server")
        projects_path = os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects"))
        os.makedirs(projects_path, exist_ok=True)
        try:
            for project_path in os.listdir(projects_path):
                project_dir = os.path.join(projects_path, project_path)
                if os.path.isdir(project_dir):
                    for file in os.listdir(project_dir):
                        if file.endswith(".gns3"):
                            try:
                                yield from self.load_project(os.path.join(project_dir, file), load=False)
                            except (aiohttp.web_exceptions.HTTPConflict, NotImplementedError):
                                pass  # Skip not compatible projects
        except OSError as e:
            log.error(str(e))