Enable progress bar on ArduinoOTA upload

[tbertels]

Is there a reason why PROGRESS isn't enabled in platform.txt?
https://github.com/espressif/arduino-esp32/blob/master/platform.txt#L13
https://github.com/espressif/arduino-esp32/blob/master/tools/espota.py#L304

I tested it with it enabled, it works fine.
The progress is shown based on the size of the file sent, so it should always work.

vs

[me-no-dev]

the reason is that ArduinoIDE's console does not support carriage return, so it will print a whole lot of lines as percentage grows.

[tbertels]

It actually does now.
Here are captures with the platform.txt patch:

When uploading by cable instead of OTA however, it still does indeed output multiple lines.

[me-no-dev]

hmm interesting. will check it out. I reopened the pull request