QtSharp app doesn't always quit properly

[ibboard]

Sometimes, even though the QtSharp app is closed, it doesn't quit. This means that either debugging remains disabled until the "stop" button is pressed, or that the console remains associated with the app if it was run from the command-line.

[ibboard]

(In r493) Re #250:

• Add extra debugging code

QApplication.Exec() should quit anyway (after completion return a success/error code and Main loop should finish) but even using Environment.Exit() never completes

[ibboard]

(In r541) Fixes #250: New panels don't work perfectly in Linux through Mono

• Manually size the panel based on the contents

[ibboard]

Re-open - last commit should have been against #260.

[ibboard]

Seems to be a problem specific to something that has been done with the WarFoundry app. Creating a new app that just contains:

		public static void Main(string[] args)
		{
			try
			{
				QApplication app = new QApplication(args, true);
				app.QuitOnLastWindowClosed = true;
				QApplication.Invoke(delegate{
					QMainWindow win = new QMainWindow();
					win.Show();
				});
				QApplication.Exec();
			}
			catch(Exception ex)
			{
				QMessageBox.Critical(null, "Unhandled exception", ex.Message+"\n\nPlease see log for more details");
			}

Terminates correctly without a problem.

[ibboard]

Problem is caused by open and save dialogs, for some reason. If they're commented out then closing successfully terminates the app.

[ibboard]

(In r635) Fixes #250: QtSharp app doesn't always quit properly

• Override Close event to dispose of file dialogs (open and save)
• Remove unnecessary event handler hooked to close
• Change app initialisation to match pattern used by Synapse
• Create file dialogs without specifying "this" as parent - seems to be main fix, for some reason.