Continue issue 242 (https://github.com/UpstreamData/pyasic/issues/242)

[Awote]

Is your feature request related to a problem? Please describe.
The problem with update pools in Bos miners.
The problem here

        boser_cfg = config.as_boser(user_suffix=user_suffix)
        for key in boser_cfg:
            await self.web.send_command(key, message=boser_cfg[key])

it fall down when i send power mode

Describe the solution you'd like
First idea:
The easiest way is add try catch in send_config.
Second idea:
Add choose what parameter of configurtion can i send.

[b-rowan]

I would rather fix the underlying issue rather than just catch the error, I think a user would rather know if there is an issue with the config rather than just send the rest of it.