[Feature request] Select channel to send payment

[Darth-Coin]

Description

I know that by default OBW is sending MPP, using all available channels and paths.
We have also option to receive to specific channel.
But sometimes, user don't want to use a specific HC for example, using only normal channels to send a payment.

Proposal

A. In the LN channels section, when you click on a LN channel, have the option "send from this channel". Once is clicked the sending payment modal will popup and user have to scan or add manually the details for the payment.
or
B. In the sending screen modal, add a simple drop down option to select online and active channel that you want to use for that specific payment.