## About the changes
Add warnings when we detect something might be wrong with the customer
configuration, in particular with regard to variants configuration
## Rationale
Moving from variants per feature to variants per environment will allow
users to have fine-grained permissions and more control over variants on
different environments: #2254
But because this requires an additional step of copying variants to
other environments, we identified the potential risk of users forgetting
to follow this step. To keep them informed about this, we're introducing
a warning sign after a toggle is enabled when we detect that:
1. The environment is enabled without variants
2. Other enabled environments have variants
This situation would be a problem if you rely on `getVariant` method
from the SDK, because without variants you'll receive the default
variant. Probably, not what you'd expect after enabling the toggle, but
there are situations where this might be correct. Because of the latter,
we thought that adding a warning and letting the user handle the
situation was the best solution.
## UI sketches
Co-authored-by: Nuno Góis <github@nunogois.com>
Fixes an issue where the `HtmlTooltip` arrow would no longer work after
a regression included with https://github.com/Unleash/unleash/pull/2891
Also adds the arrow prop to most usages of the tooltip to keep
consistency.
