Description of the enhancement:
Essentially, we have many dashboards with floating page selectors, e.g. Cost Centre list (or subset). We want to be able to ensure that the dashboards always open with the top level Cost Centre selected, not first leaf item Cost Centre.
Business use case:
In a scorecard dashboard, we would have e.g. a Cost centers list published as a page selector.
When we open the dashboard, we see a specific cost center (e.g. Bobby123) in the page selector by default.
We would want "All cost center" to be set as the default option in this page selector when the dashboard is opened.
