Application some times crashes on close

[dboun]

I think this happens because when the algorithm starts threads are opened and then some of them are never joined.

I think this because I tried:

• Opening the application > Closing the application ---> Didn't crash
• Opening the application > Loading some images > Closing the application ---> Didn't crash

Also on linux it says 'terminate called without an active exception' before 'Aborted (core dumped)'. According to this, the active exception thing is because of threads.

[dboun]

Fixed. It was a combination of some threads not joined and the DataManager not being emptied before closing.