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/MainWindow.h

@@ -26,19 +26,18 @@ private:
 	int m_curSeverity;
 
 	FileInfoWindow* m_infoWindow;
-	QFileSystemModel* fmodel;
-	QStringList filters, dropDownDirList;
+	QFileSystemModel* m_fmodel;
+	QStringList m_filters;
 
 // functions
 private:
 	void setupWidgets();
-	void getAssetLibrary();
-	void setAsset(QString);
+	void setupAssetLibrary();
+	void updateAssetTree(QString);
 	void searchMeshFiles(QString path);
-	void openFile();
-	void openFileActual(QString);
+	void openFileDialog();
+	void openFile(QString);
 	void takeScreenShot();
-	void setDirList();
 	void aboutTool();
 
 protected: