Fix Qt inputhook

Closes gh-6804

IPython/lib/inputhook.py

@@ -363,7 +363,7 b' class Qt4InputHook(InputHookBase):'
         """
         from IPython.lib.inputhookqt4 import create_inputhook_qt4
         from IPython.external.appnope import nope
-        app, inputhook_qt4 = create_inputhook_qt4(self, app)
+        app, inputhook_qt4 = create_inputhook_qt4(self.manager, app)
         self.manager.set_inputhook(inputhook_qt4)
         nope()