ViewWidgets: Move to pragma once

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

src/ViewWidgets/CustomCommandWidget.h

 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -11,8 +11,7 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-#ifndef CustomCommandWidget_H
-#define CustomCommandWidget_H
+#pragma once
 
 #include "QGCQmlWidgetHolder.h"
 
@@ -24,4 +23,3 @@ public:
     CustomCommandWidget(const QString& title, QAction* action, QWidget *parent = 0);
 };
 
-#endif

src/ViewWidgets/CustomCommandWidgetController.h

 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -8,8 +8,7 @@
  ****************************************************************************/
 
 
-#ifndef CustomCommandWidgetController_H
-#define CustomCommandWidgetController_H
+#pragma once
 
 #include <QObject>
 
@@ -38,4 +37,3 @@ private:
     static const char*  _settingsKey;
 };
 
-#endif

src/ViewWidgets/ViewWidgetController.h

 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -8,8 +8,7 @@
  ****************************************************************************/
 
 
-#ifndef VIEWWIDGETCONTROLLER_H
-#define VIEWWIDGETCONTROLLER_H
+#pragma once
 
 #include <QObject>
 
@@ -38,4 +37,3 @@ private:
 	UASInterface*           _uas;
 };
 
-#endif
\ No newline at end of file