Add more granual control to edit tracking

[jamesbt365]

Currently, any message that is edited (regardless of how old) is tracked if edit tracking is enabled. This can lead to users editing very old messages and it invoking a bot command.

[oinkrr]

I agree. It enables trolling by editing really old messages. I have already experienced that issue inside one of our servers where people edited messages from 2016.

[jamesbt365]

With discord sending the whole message payload on message edit now (instead of just the changed parts) this is more important than ever, the library should also include a way to ONLY edit messages that are cached, as discord will update old messages with embeds and some stuff sometimes.

Not sure of the specifics, but this does happen and may send responses into chat without any user interaction.