[DataViews] When we hide fields from the columns in table view, there is a focus loss #57341

When columns are hidden from the column header menu, the menu is necessarily removed from the DOM, which leaves focus at the whim of the user agent. We need to be intentional about focus movement in this case.

Additionally, there are others areas of interaction that can lead to focus loss. When tables are sorted, filtered, or paginated, new data can be fetched. If this takes time to come back, the header is currently replaced with a "no results" message, until the fetch is complete.