System checks

Run python manage.py check after changing the settings. These checks only warn, they never stop your project from starting.

Id	Warns when
`insights.W001`	`INSIGHTS_DASHBOARD_PERMISSIONS` is not a list or tuple
`insights.W002`	a permission is not a class with a `has_permission(request)` method; the dashboard denies access until it is fixed
`insights.W003`	the chart cache is on, but `INSIGHTS_MEDIA_CACHE_ROOT` is not set
`insights.W004`	`DATABASES` has no `insights` entry
`insights.W005`	`django_insights.database.Router` is not in `DATABASE_ROUTERS`
`insights.W006`	a setting still uses its old `INSIGHT_` name, which is ignored
`insights.W007`	`INSIGHTS_STYLE` is not a known style; `vega` is used
`insights.W008`	the `base` or `accent` of `INSIGHTS_THEME` is not known
`insights.W009`	`INSIGHTS_THEME` has the wrong shape, an unknown key or color name, or a color that is not `"#rrggbb"`
`insights.W010`	`INSIGHTS_CHART_LIGHT_PRIMARY_COLOR` or `INSIGHTS_CHART_DARK_PRIMARY_COLOR` is still set; use `INSIGHTS_THEME`
`insights.W011`	`INSIGHTS_DEFAULT_THEME` is not `light` or `dark`; `dark` is used
`insights.W012`	`INSIGHTS_CHART_DPI` is not a positive whole number; `180` is used

To silence one, add it to SILENCED_SYSTEM_CHECKS:

SILENCED_SYSTEM_CHECKS = ["insights.W003"]