There are two bulk select forms for EB available in views configuration

I'll work on the update hook.

OK, I added an update hook for this and also changed the logic in entity_browser_views_data_alter() to check for the data table instead of the base table before adding the "entity_browser_select" field.

Added a check to prevent the notices from the last test run.

Ah - this is going to be hard or impossible to implement as some Entities, like File, have no Data Table:

>>> \Drupal::entityTypeManager()->getDefinitions()['file']->getBaseTable()
=> "file_managed"
>>> \Drupal::entityTypeManager()->getDefinitions()['file']->getDataTable()
=> null

Does the patch need to be re-written to remove the duplicate using the data table instead of the duplicate using the base table?

OK - I'll work on a re-roll to remove/migrate the data table field, and look into test coverage.

Here's a re-roll with a test (which I can't get running locally, strangely enough).

file_get_contents was using a relative dir, should be fixed.

Hopefully fixed some minor bugs in the tests.