[Feature request] store channelId in blocklist instead of channel names

[rsa17826]

Checklist

• I have searched for existing issues (open and closed) and confirmed this feature hasn't been requested before
• I believe this feature request will benefit more than 10% of users, not just myself

Feature Description

people can easily change their channel names which would cause them to be unblocked and you can't block a single person, as when more than one channel has the same name they will all be blocked.

[rsa17826]

topic labler just told me it failed, not sure what to do about that?