51e42d8e92
introduced filtering options which handles the last (unterminated) line
with a delay. This introduced poor performance for console applications
when the user interacts with the ESP32 device in the same line because
there is an artificial delay for each key-press.
bb152030a0
decreased the delay but there are still delays for each key-presses.
The current fix makes only one delay per line instead of each
key-presses. When an unterminated line is detected then no more
"delayed" print is used for the given line.
Fixes https://github.com/espressif/esp-idf/issues/2054
b8937e5522