a couple small bug fixes
- wsh not being executable in windows (this doesn't add it to the path
yet)
- windows using the wrong slash for the path to wsh on the remote
This makes it possible to send wsh commands from wsh on a remote session
to wavesrv running locally. The exact behavior of running those commands
isn't implemented, but the underlying interface is added here.
This enables basic ssh for connections using publickey auth without a
passphrase. It can be established by creating a widget with the "meta"
property set to
```
{
"connection": "<user>@<host>:<port>"
}
```
where the :<port> is optional.
---------
Co-authored-by: sawka <mike.sawka@gmail.com>
