option for disable shift-out / shift-in
The VT100-compatible if an ASCII 0x0e SO code is sent to the terminal, it switches to a graphical character set.
This happens when hot plugging, wrong baudrate, and other hardware issue, sometimes you can't do shift-in back, but only reset teraterm.
I changed that other shift function can be disabled.
To disable the shift-in and shift-out, add the following in teraterm.ini: