Error experience in create alert flow

[alexfrancoeur]

This feels like an area where we might be able to improve the UX. I didn't realize it was erroring out, I just thought it wasn't saving. Maybe a toast or a callout at the bottom would help if the creation errors out.

Separate question, is this a known error?

cc: @mdefazio @YulNaumenko

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[mikecote]

@mdefazio any UX suggestions for this? I was seeing if I could move the error box into the flyout header but can't due to it being part of EuiForm within the flyout body.

I was thinking either scrolling up to the error box or display something within a toast message.

[mdefazio]

I will work on mocking up something. I think if we show a toast at the bottom, or a callout perhaps, that might alleviate this.