This looks very nice, lots of great extra features over the vanilla UI. One possible improvement: I had accidentally mistyped my API key and it popped up an HT

This looks very nice, lots of great extra features over the vanilla UI. One possible improvement: I had accidentally mistyped my API key and it popped up an HTTP 500 error instead of going "That doesn't seem to be a valid API key, could you make sure you pasted it in correctly" or something...