Add first version of a new sidebar, including project selector.

The project selector also allows to select targets.
However, this is not yet used, since the necessary
changes are still being stabilized.

Done-with: con

src/plugins/coreplugin/fancyactionbar.h

@@ -54,9 +54,6 @@ public:
 
 private slots:
     void actionChanged();
-
-private:
-    const QMap<QString, QPicture> &m_buttonElements;
 };
 
 class FancyActionBar : public QWidget
@@ -68,6 +65,8 @@ public:
 
     void paintEvent(QPaintEvent *event);
     void insertAction(int index, QAction *action, QMenu *menu = 0);
+    void addProjectSelector(QAction *action);
+    QLayout *actionsLayout() const;
 
 private slots:
     void toolButtonContextMenuActionTriggered(QAction*);