title: QWebEngineView and QWidget in PyQt5
body: <p>Python 3.6.1
  PyQt5 (5.8.2)
  OS: Windows
  Ask:
  I want to open site in programm and show botton in top or maybe not bottom, but i don't show nothing from QWidgets if i show QWebEngineView, and don't show QWebEngineView if QWidgets. How can i show QWebEngineView and QWidget in 1 window?
  My code:</p>
  
  <pre><code>from PyQt5.QtCore import QUrl
  from PyQt5.QtWidgets import *
  from PyQt5.QtWebEngineWidgets import QWebEngineSettings, QWebEngineView, QWebEnginePage
  from PyQt5.QtGui import QIcon
  import PyQt5
  import sys
  
  class MyBrowser(QWebEnginePage):
  
      def userAgentForUrl(self, url):
          return "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36"
  
  class Web(QWebEngineView):
  
      def load(self, url):
          self.setUrl(QUrl(url))
  
      def adjustTitle(self):
          self.setWindowTitle(self.title())
  
      def disableJS(self):
          settings = QWebEngineSettings.globalSettings()
          settings.setAttribute(QWebEngineSettings.JavascriptEnabled, False)
  
  class Main(QWidget):
  
      def __init__(self):
          super().__init__()
          self.initUI()
  
      def initUI(self):
          self.setWindowTitle('Name')
          self.setWindowIcon(QIcon('icon.png'))
  
          self.btn = QPushButton('Button', self)
          self.btn.resize(self.btn.sizeHint())
          self.btn.move(20, 20)
          self.show()
  
  app = QApplication(sys.argv)
  web = Web()
  main = Main()
  web.load("https://google.com")
  web.show()
  app.exec_()
  </code></pre>