* Add Hahash dependency
* Don't leak internal server error details to the user
* Show the sinking shuttle notice whenever an API error occurs
* Don't render "No data yet" when there's a NetworkError for example
* Use ApiErrorNotice in funnels
* Display either hash or actual error message
The reason "internal-server-error" doesn't work well as a fallback
hash is that e.g. `NetworkError when attempting to fetch resource`
might be completely at client's fault. In such cases it's better
to display the whole thing still.
* Remove unused RocketIcon
