removed unused or useless stuff,

renamed some functions for better description,
repaired the SettingsManager usage,
ToDo:
Dropdown list is not updated, it needs a restart,
display names for the directories instead of the path,

QtMeshViewer/Header/SettingsWindow.h

@@ -11,16 +11,11 @@ class SettingsWindow : public QWidget
 public:
 	SettingsWindow(QWidget * parent = Q_NULLPTR);
 	~SettingsWindow();
-	QString getDirList();
 
 private:
 	Ui::SettingsWindow* ui;
 
 	void setupConnections();
-	void updateDirList();
-
-private:
-	QString dirList;
 
 private slots:
 	void autoColorToggled();
@@ -42,5 +37,6 @@ signals:
 	void sendBackfaceCulling(bool value);
 	void sendZommSpeed(int percent);
 	void changeLightType(int value);
+	void pathChanged(QString path);
 	
 };