include parent Application in InteractiveShell.configurables

for use in %config magic

IPython/frontend/terminal/ipapp.py

@@ -320,6 +320,7 b' class TerminalIPythonApp(BaseIPythonApplication, InteractiveShellApp):'
         self.shell = TerminalInteractiveShell.instance(config=self.config,
                         display_banner=False, profile_dir=self.profile_dir,
                         ipython_dir=self.ipython_dir)
+        self.shell.configurables.append(self)
 
     def init_banner(self):
         """optionally display the banner"""

IPython/zmq/ipkernel.py

@@ -780,6 +780,7 b' class IPKernelApp(KernelApp, InteractiveShellApp):'
 
     def init_shell(self):
         self.shell = self.kernel.shell
+        self.shell.configurables.append(self)
 
 
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