Views 'Translation status' filter should interpret NULL as FALSE

When exposing the Translation status Views filter, users are given three options: Any, True, and False. I would expect that if they choose False, we should display both entities that do not have a translation, and entities that only have an unpublished translation. However, the filter currently only displays entities matching the second condition.

I think this would improve consistency with the Translation status Views field plugin. With the field plugin, if an entity has no translation (no record in the entity_translation table, i.e. the join is NULL), the row still displays the False/No label. So if you table-sort a View by the Translation status field, you will see a True or False in every row, allowing you to pseudo-filter the list. But then if you add the Translation status filter to simplify this filtering process, and a user selects False, the View might come up empty, even though there were False records listed through table-sorting.