Delete existing Mail Lists when email account is removed
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Currently when an email account is disconnected from Vivaldi mail, any Mailing List entries generated by that account will remain in the browser.
There should be a way to clear all mailing lists, and they should clear automatically when an account is removed.
In addition - in my case, there are five mailing lists that can't be deleted at all, even with no mail account added:
There needs to be a way to clear all mail data if mail is no longer being used / no account exists. (Note that I am using the feed reader, but I don't think this is related)