Make C++ code style configurable.

Change-Id: Iaf08edb2361146e6b5e1cbafdb716a23c938875b
Done-with: Jarek Kobus
Task-number: QTCREATORBUG-2670
Task-number: QTCREATORBUG-4310
Task-number: QTCREATORBUG-2763
Task-number: QTCREATORBUG-3623
Task-number: QTCREATORBUG-567
Reviewed-on: http://codereview.qt.nokia.com/74
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@nokia.com>
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/plugins/qmljseditor/qmljseditor.h

@@ -164,6 +164,7 @@ public:
                                                         TextEditor::AssistReason reason) const;
 
 public slots:
+    virtual void setTabSettings(const TextEditor::TabSettings &ts);
     void forceSemanticRehighlight();
     void followSymbolUnderCursor();
     void findUsages();