It's easy to add channels to "remote" tab, but it's impossible to remove them from remote, the only way is to change ch. parameter remote number to 0.
A single option in menu, perhaps for Remote tab only "Remove from Remote" would solve the problem and it would be possible to remove even multiple channels at once.
"Delete" in remote tab works like "Remove from Remote", it doesn't delete the channel from the general tab.
But I think probably it is scary to try that
I will try to add "Remove from Remote" separately)