TextEditor: Introduce a BaseTextEditorFactory

The BaseTextEditorFactory will keep a collection of all
relevant creation functions (document, editor, widget,
indenter, syntax highlighter) and will use them to
create or duplicate base text editors in a uniform way.

Change-Id: I255b519e35cf1c28d5e198242f99316951a0235e
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/vcsbase/basevcseditorfactory.h

@@ -45,7 +45,7 @@ class VCSBASE_EXPORT VcsEditorFactory : public Core::IEditorFactory
 
 public:
     VcsEditorFactory(const VcsBaseEditorParameters *type,
-                     const TextEditor::BaseTextEditor::WidgetCreator &creator,
+                     const TextEditor::BaseTextEditorWidgetCreator &creator,
                      QObject *describeReceiver,
                      const char *describeSlot);
     ~VcsEditorFactory();