Clean the project name when closed.

src/Project/ProjectManager.cpp

@@ -251,8 +251,9 @@ bool    ProjectManager::closeProject()
         delete m_projectFile;
         m_projectFile = NULL;
     }
+    m_projectName = QString();
     //This one is for the mainwindow, to update the title bar
-    emit projectUpdated( ProjectManager::unSavedProject, true );
+    emit projectUpdated( projectName(), true );
     //This one is for every part that need to clean something when the project is closed.
     emit projectClosed();
     return true;