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/sendcoinsdialog.cpp

@@ -5,17 +5,17 @@
 #include "sendcoinsdialog.h"
 #include "ui_sendcoinsdialog.h"
 
+#include "addresstablemodel.h"
 #include "bitcoinunits.h"
+#include "coincontroldialog.h"
 #include "guiutil.h"
 #include "optionsmodel.h"
 #include "sendcoinsentry.h"
 #include "walletmodel.h"
-#include "coincontroldialog.h"
-#include "addresstablemodel.h"
 
 #include "base58.h"
-#include "ui_interface.h"
 #include "coincontrol.h"
+#include "ui_interface.h"
 
 #include <QMessageBox>
 #include <QScrollBar>
@@ -34,7 +34,6 @@ SendCoinsDialog::SendCoinsDialog(QWidget *parent) :
     ui->sendButton->setIcon(QIcon());
 #endif
 #if QT_VERSION >= 0x040700
-    /* Do not move this to the XML file, Qt before 4.7 will choke on it */
     ui->lineEditCoinControlChange->setPlaceholderText(tr("Enter a Bitcoin address (e.g. 1NS17iag9jJgTHD1VXjvLCEnZuQ3rJDE9L)"));
 #endif