feat(ui): Add custom title functionality (#825)

src/components/Settings/SettingsLayout.tsx

@@ -2,8 +2,10 @@ import React from 'react';
 import Link from 'next/link';
 import { useRouter } from 'next/router';
 import { defineMessages, useIntl } from 'react-intl';
+import PageTitle from '../Common/PageTitle';
 
 const messages = defineMessages({
+  settings: 'Settings',
   menuGeneralSettings: 'General Settings',
   menuPlexSettings: 'Plex',
   menuServices: 'Services',
@@ -91,6 +93,7 @@ const SettingsLayout: React.FC = ({ children }) => {
   };
   return (
     <>
+      <PageTitle title={intl.formatMessage(messages.settings)} />
       <div className="mt-6">
         <div className="sm:hidden">
           <select