Display Screen fails to handle Flask-gTTS failure with no internet

[mrf345]

Describe the bug
Display Screen fails to handle Flask-gTTS failure when the machine is not connected to the internet.

To Reproduce
Steps to reproduce the issue:

1. Disconnect your internet.
2. Go to the display screen.
3. Checkout the JS Console.

Please complete the following information:

• Operating System (OS): Windows 10
• Browser: N\A
• FQM Version: 0.8.1

Error:

Traceback (most recent call last):
  File "C:\Program Files\Python37-32\lib\site-packages\flask\app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Program Files\Python37-32\lib\site-packages\flask\app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Program Files\Python37-32\lib\site-packages\flask\app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Program Files\Python37-32\lib\site-packages\flask\_compat.py", line 35, in reraise
    raise value
  File "C:\Program Files\Python37-32\lib\site-packages\flask\app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Program Files\Python37-32\lib\site-packages\flask\app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Program Files\Python37-32\lib\site-packages\flask_gtts\main.py", line 148, in wrapper
    return function(*args, **kwargs)
  File "C:\Program Files\Python37-32\lib\site-packages\flask_gtts\main.py", line 160, in gtts_route
    return jsonify(mp3=self.say(language, text)
  File "C:\Program Files\Python37-32\lib\site-packages\flask_gtts\main.py", line 102, in say
    generator.save(file_path)
  File "C:\Program Files\Python37-32\lib\site-packages\gtts\tts.py", line 249, in save
    self.write_to_fp(f)
  File "C:\Program Files\Python37-32\lib\site-packages\gtts\tts.py", line 194, in write_to_fp
    str(e))
gtts.tts.gTTSError: Connection error during token calculation: HTTPSConnectionPool(host='translate.google.com', port=443): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x0672D150>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed'))