Display state of mesh boundary edges now stored in GLViewer and controlled by toolbar buttons in UIMainWindow.

Shading model state (flat or smooth) now stored in GLViewer and controlled by toolbar buttons in UIMainWindow.

updateCurrentProjectContent() and updateTypeFilters() functions of UIMainWindow modified so as to avoid excessive update calls.

UIMainWindow::saveProjectOptions() function modified for a correct formatting of strings containing special characters during the XML export.

ExportInterface::parameters() function renamed to declareParameters() and is not set to purely virtual anymore.

Bug fixed in the import of a file when no project exists and the user presses the "Cancel" button in the "New project" dialog box.

Set/GetParameters functions removed from ToolInterface. onUpdatingParameter function modified accordingly to get access to the UIParamSet of the current tool.

Bug fixed in the reinitialization of the GLViewer when a project is created/opened or when the last project has been closed.