Attached data admin view date range filters always match first/last date if selected start/end end is after/before

[Ambient-Impact]

This feels counter-intuitive and at the very least should be exposed on the filter form, and ideally should not match by default in these cases. As a more visual example, take the following:

|-------------------|-------------------|---------------|
^                   ^                   ^               ^
"First date"        2049/10/05          2049/10/09      "Last date"

Currently, choosing "2049/10/05" as the start date to filter will still include every date before it, e.g. "2049/10/04", "2049/10/03", etc., which doesn't make intuitive sense. The same goes for the end date. What is expected from a user's point of view is that choosing an explicit date will exclude all dates outside of that range. For example, choosing "2049/10/05" as a start date should not match "2049/10/04", "2049/10/03", etc.

See neurocracy/drupal-omnipedia-date#2 for implementation details.