feature request: custom saved regular expression

[t4k]

I'd like to be able to get a specifically-formatted random string for which I know the regular expression, and I'd like to be able to set it in the extension settings for quick access without having to select Random: Regular Expression and go find it and paste it every time I want to use it. If I could save the expression in settings and then invoke via Random: Saved Regular Expression or something like that it would be amazing.