Fixed Linux closing bug

Author: RubioJr9

src/Core/Application/Application.cc

@@ -64,9 +64,8 @@ namespace SCIRun
 {
   namespace Core
   {
-    class ApplicationPrivate
+    struct ApplicationPrivate
     {
-    public:
       CommandLineParser parser;
       boost::filesystem::path app_filepath_;
       boost::filesystem::path app_filename_;

src/Dataflow/Engine/Controller/NetworkEditorController.cc

@@ -102,6 +102,7 @@ NetworkEditorController::~NetworkEditorController()
 #ifdef BUILD_WITH_PYTHON
   NetworkEditorPythonAPI::clearImpl();
 #endif
+  executionManager_.stop();
 }
 
 namespace

src/Interface/Application/SCIRunMainWindowQtOverrides.cc

@@ -108,6 +108,7 @@ void SCIRunMainWindow::closeEvent(QCloseEvent* event)
   {
     writeSettings();
     event->accept();
+    quit();
   }
   else
     event->ignore();