Surface invalid browser key pattern errors

[stdavis]

The app shows a generic error message when a user attempts to create a new browser key with an invalid pattern.

The error message from the server (invalid key pattern) should be surfaced to the user or the pattern should be validated client-side.

[steveoh]

what did you do to create this error? I'm curious what server side checks we do that may not be possible on the client.

[stdavis]

I attempted to add a browser key with a pattern of *.

[steveoh]

I think the problem is mainly that there isn't any validation