VSCode : "Send to Serial" interface doesn't work as expected.

[vcolella]

First of all, cudos for your extension @nesnes !

My issue : In VSCode, when opening a Serial port I expect some info messages from my micro controller, but they don't show up in Teleplot's "log" window. Further more, my micro requires some inputs before beginning the data stream. The "Send to Serial" input does work if I try to send the commands "blindly".

Also worth noting, after sending commands, the values are kept in the input box instead of it being emptied, which is confusing.

This might be related to #23. I'll try to figure out what's happening in the code, any tips would be greatly appreciated.