Reset SLI/SLO dashboard styling
Reset SLI/SLO dashboard styling

This change resets the styling of our SLI/SLO widgets to match the
fact that we do not yet have SLOs for a number of items, such as the
time-based SLIs. This is also in preparation for upcoming additional
changes with regard to how our probes are defined.

pivotal-cf-experimental/datadog-config-oss,pivotal-cf-experimental/datadog-config-oss