Replace darkMode state w/ new useStickyState hook

src/App.js

@@ -5,9 +5,10 @@ import { Switch, Route } from "react-router-dom";
 import PrivateRoute from "./components/PrivateRoute/";
 import AppView from "./components/AppView/";
 import LoginForm from "./components/LoginForm/";
+import { useStickyState } from "./utilities";
 
 function App() {
-	const [darkMode, setDarkMode] = useState(false);
+	const [darkMode, setDarkMode] = useStickyState(false);
 
 	const theme = webqueueTheme(darkMode);
 
@@ -20,7 +21,7 @@ function App() {
 				<PrivateRoute path="/">
 					<AppView setDarkMode={setDarkMode} />
 				</PrivateRoute>
-			</Switch>
+			</Switch>	
 		</ThemeProvider>
 	);
 }