A different serial handler class is used when there was no ELF file
passed do esp-idf-monitor. This fix will ensure that print filter check
is respected in this case as well.
Add idf.py monitor argument --no-reset (-R) to prevent resetting the CPU on monitor startup
idf.py monitor: fix type signature
idf.py monitor: fix reset key shortcut when --no-reset (-R) argument is used
idf.py monitor: change --no-reset (-R) argument descriptions in help
idf.py monitor: simplify --no-reset (-R) argument checks
idf.py monitor: add warning if --no-reset is used, but --port is not given
idf.py monitor: ignore --no-reset if --port is not given
