TextEditor: Start moving data from *EditorWidget to *Editor

Goal is to consolidate "controller" related data in the *Editor hierarchy.
This patch introduces temporary "cross-Private" accessors dd() to
keep the patches small.

First item moved is the AutoCompleter, a glimps at long term benefits
is the simplification in the JavaEditorWidget which is now essentially
a BaseTextEditorWidget, only containing the still-wrong createEditor().
But that can only be move if the *Editors are self-contained, i.e.
keep data themselves, not indirectly through the *EditorWidgets.

Change-Id: Ia0ab90f0322bb17ac20458e6581069eed30acbaf
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/qmljseditor/qmljseditor.cpp

@@ -35,7 +35,6 @@
 #include "qmljseditorplugin.h"
 #include "qmloutlinemodel.h"
 #include "qmljsfindreferences.h"
-#include "qmljsautocompleter.h"
 #include "qmljscompletionassist.h"
 #include "qmljsquickfixassist.h"
 
@@ -120,7 +119,6 @@ void QmlJSTextEditorWidget::ctor()
     setParenthesesMatchingEnabled(true);
     setMarksVisible(true);
     setCodeFoldingSupported(true);
-    setAutoCompleter(new AutoCompleter);
     setLanguageSettingsId(QmlJSTools::Constants::QML_JS_SETTINGS_ID);
 
     m_updateUsesTimer = new QTimer(this);