[Discover][New table] Improve document selection

[kertal]

When selecting documents in the new table we currently select and filter only in UI, based on the records that are fetched from ES (this is usually a sample of max 500 documents).

It works like the classic table in this case, when you expand a document, change the time range so it is no longer in between this range, the document is no longer displayed.

Once a user selects documents, those should not vanish just because those documents were selected at the start of 1500 records and after inverting the sorting they are no longer available.

The desired behavior should be: When the user selects a doc, clicks on "Show selected documents only", those docs should be displayed even if the user changes the time range or filters in the meantime, also sorting should work in this case.

To achieve this behavior we need to change architecture. When Show selected documents only is selected, this should trigger a request to ES using the ids of the selected docs with same sorting like in the complete table. Since there can be multiple records with the same id in a set of documents, so we need to add an additional filter client side, to show only the documents the user selected.

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[kertal]

Closing this because it's not planned to be resolved in the foreseeable future. It will be tracked in our Icebox and will be re-opened if our priorities change. Feel free to re-open if you think it should be melted sooner.