Give TextEditorActionHandler an explicit parent and unify usage.

The action handler implicitly passed ownership to ICore, which is non-
to the action handler. We now consistently create the action handler in
the editor factory, give ownership to the editor factory, and don't hold
a reference to it.

Change-Id: I4372f8de966e3ceff87c06c5528c6b54522c1d57
Reviewed-by: David Schulz <david.schulz@digia.com>

src/plugins/pythoneditor/pythoneditorplugin.h

@@ -31,9 +31,7 @@
 #define PYTHONEDITOR_PLUGIN_H
 
 #include <extensionsystem/iplugin.h>
-#include <texteditor/texteditoractionhandler.h>
 #include <QSet>
-#include <QScopedPointer>
 
 namespace PythonEditor {
 namespace Internal {
@@ -65,7 +63,6 @@ public:
 private:
     static PythonEditorPlugin *m_instance;
     EditorFactory *m_factory;
-    TextEditor::TextEditorActionHandler *m_actionHandler;
     QSet<QString> m_keywords;
     QSet<QString> m_magics;
     QSet<QString> m_builtins;