Config loader gives up even if a config file is specified in FLASKBB_SETTINGS

[gordonjcp]

Even if you specify a path to a config file, flaskbb will report an error

[!] No 'flaskbb.cfg' config found. You can generate a configuration file with 'flaskbb makeconfig'.

This is to do with the app loader in app.py, and possibly utils/helpers.py get_flaskbb_config()