title: Python/PyQt reopening QWebView shows blank page
body: <p>I have this problem with QWebView not showing anything after I rerun QAplication. This small snippet displys the problem:</p>
  
  <pre><code>import sys
  from PyQt4 import QtGui, QtWebKit, QtCore
  
  app = QtGui.QApplication(sys.argv)
  while True:
      browser = QtWebKit.QWebView()
      browser.setUrl(QtCore.QUrl('https://www.google.ca/#q=pyqt'))
      browser.show()
      app.exec_()
  </code></pre>
  
  <p>Upon running, the google search page for pyqt is shown, but once I close the widget, next one pops up as blank instead of the same search page. I was wondering what I'm doing wrong here?</p>