[APM] Service map: Add empty state

[sorenlouv]

It's not possible to distinguish between "no data" and "data loading" because the canvas is empty either way.

Solution

Show an EuiEmptyPrompt component on the page with the following content;

Title: No services available.
Content: We can’t find any services to map within the currently selected time range and environment. Please try another range or check the environment selected. If you don’t have any services, please use our setup instructions to get started.

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[formgeist]

We could start with showing a EuiEmptyPrompt component on the page with the following content;

Title: No services available.
Content: We can’t find any services to map within the currently selected time range and environment. Please try another range or check the environment selected. If you don’t have any services, please use our setup instructions to get started.

[sorenlouv]

@formgeist Looks good. Should we convert this to an implementation issue or create a new one?
Edit: I've converted this into an implementation issue. Feel free to create a new one if that's better.

[formgeist]

@sqren I think that's fine 👍