Add option to widgetize "Overview" reports #18816

It seems that this used to be possible with the "Widgetize" function for most reports using actionToWidgetize=index
I'm not sure when this was removed, but it means that its no longer to add widgets to a dashboard or in an iframe for certain reports that include some useful information such as the sparklines for the different metrics. Eg.:

According to the list here: https://matomo.org/docs/embed-matomo-reports/#customising-the-widgets
It is not longer an option to get this sort of report in a widget.

FYI there is the KPI Metric widget if that helps?

@tsteur It works, but only for the Visits metric if I recall correctly?

You can change it to any metric