Allow to open the related output channel from the running function

[lstocchi]

Is your feature request related to a problem? Please describe.
I would like to have a way to select the output channel related to the running function i click on.
Even when an action related to the function is executed (e.g Stop it) the output channel should be focussed.

Describe the solution you'd like
I see this in two ways.
Or to have another button next to the Stop action or enable a double-click on the node

Additional context
This is related to #261