add channel info to admin order detail or list page

[choim4389]

Is your feature request related to a problem? Please describe.
In a multi-channel environment, there is an inconvenient problem in checking the channel in the order detail or list of the default channel.

Describe the solution you'd like
It would be nice to be able to check the corresponding channel in order details and order list.

[choim4389]

Are there any plans to add this feature?

[dlhck]

@choim4389 I assume you want to see what channel this order was placed in, right? Could you please confirm that?

[dlhck]

Could be done together with #2903