Coincontrol cleanup (e.g. add missing license)

- add missing license headers
- make compatible with Qt5
- enforce header cleanup style
- small code style cleanups
- rename Coin Control dialog into Coin Control Address Selection
- use default font for the windows labels (no monospace)

src/qt/coincontroltreewidget.h

@@ -1,17 +1,22 @@
+// Copyright (c) 2011-2013 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef COINCONTROLTREEWIDGET_H
 #define COINCONTROLTREEWIDGET_H
 
 #include <QKeyEvent>
 #include <QTreeWidget>
 
-class CoinControlTreeWidget : public QTreeWidget {
-Q_OBJECT
+class CoinControlTreeWidget : public QTreeWidget
+{
+    Q_OBJECT
 
 public:
     explicit CoinControlTreeWidget(QWidget *parent = 0);
 
 protected:
-  virtual void  keyPressEvent(QKeyEvent *event);
+    virtual void keyPressEvent(QKeyEvent *event);
 };
 
 #endif // COINCONTROLTREEWIDGET_H