Single Step replacement of Dashboard DataSource

[burnalting]

On occasion, a primary (in terms of usage) index will need to be rebuilt. Once rebuilt, it would have value to, in one step, replace reference to the old index in Dashboards to the newly built index.

Although it doesn't have to be a function of the UI, even documentation to achieve this via a database batch script would have value.

It is assumed that the Dashboards would NOT remove display or search elements in this situation.

The main idea is for the user to not have to modify 50-60 dashboards.