Feature Request: add url filters for custom commands

[asfaltboy]

For example, if I have a command that I'd like to open only on specific hosts / path / url (matching a regex can be nice), I can add a key in command.json that will limit the command to be displayed only on those sites. We can also add an "exclude" filter to show on all pages but the matching pages. The filters may accept a list of values for added flexibility.

[iambriansreed]

I like this a lot. Will schedule for future release.

[iambriansreed]

This gave me the idea for the integrated and relevant add gist. https://twitter.com/backtickninja/status/872530792332890112
Thanks!