Using teleport for tooltips. Moved theme class to body tag with UI observer.

assets/js/ui/observers.js

@@ -1,4 +1,13 @@
 function initUiObservers(store, _router) {
+	const body = document.querySelector('body');
+
+	body.classList.add(store.state.ui.theme);
+
+	store.watch(state => state.ui.theme, (newTheme, oldTheme) => {
+		body.classList.add(newTheme);
+		body.classList.remove(oldTheme);
+	});
+
 	document.addEventListener('keypress', (event) => {
 		if (event.target.tagName === 'INPUT') {
 			return;