Added saved file location, Flight Data logging

Also renamed from QGCSettingsWidget to SettingsDialog to better reflect
usage.

src/ui/QGCSettingsWidget.h

-#ifndef QGCSETTINGSWIDGET_H
-#define QGCSETTINGSWIDGET_H
+/*=====================================================================
+ 
+ QGroundControl Open Source Ground Control Station
+ 
+ (c) 2009 - 2015 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ 
+ This file is part of the QGROUNDCONTROL project
+ 
+ QGROUNDCONTROL is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+ 
+ QGROUNDCONTROL is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ 
+ You should have received a copy of the GNU General Public License
+ along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
+ 
+ ======================================================================*/
+
+#ifndef SETTINGSDIALOG_H
+#define SETTINGSDIALOG_H
 
 #include <QDialog>
 #include "MainWindow.h"
 
 namespace Ui
 {
-class QGCSettingsWidget;
+    class SettingsDialog;
 }
 
-class QGCSettingsWidget : public QDialog
+class SettingsDialog : public QDialog
 {
     Q_OBJECT
-
+    
 public:
-    QGCSettingsWidget(JoystickInput *joystick, QWidget *parent = 0, Qt::WindowFlags flags = Qt::Sheet);
-    ~QGCSettingsWidget();
-
-public slots:
+    SettingsDialog(JoystickInput *joystick, QWidget *parent = 0, Qt::WindowFlags flags = Qt::Sheet);
+    ~SettingsDialog();
+    
+    public slots:
     void styleChanged(int index);
     void selectCustomMode(int mode);
-
-private slots:
+    
+    private slots:
     void _deleteSettingsToggled(bool checked);
+    void _selectSavedFilesDirectory(void);
+    void _validateBeforeClose(void);
     
 private:
-    MainWindow* mainWindow;
-    Ui::QGCSettingsWidget* ui;
-    bool updateStyle(QString style);
+    MainWindow*         _mainWindow;
+    Ui::SettingsDialog* _ui;
 };
 
-#endif // QGCSETTINGSWIDGET_H
+#endif