Custom flask app path value not respected in generated configuration

Testing #280

* Create an app with following path `/home/parallels/folder1/test-flask/test-flask2/init.py`
* Attempt to create a configuration from `/home/parallels/folder1/test-flask`
* Input the path value `/home/parallels/folder1/test-flask/test-flask2/init.py` and see that configuration contains default value `app.py`

