function showTitleLoader(immortal = false) {
	if (typeof immortal === "boolean") {
		loaderIsImmortal = immortal;
	}

	setTimeout(() => {
		app.classList.remove("title-loading-hide");
		app.classList.add("title-loading");
	}, 0);
}
Shows title loader
@param {boolean} [immortal] If true, the loader will not be removed automatically