Simplify/Reclarify "Impossible to Identify" pop-up on observation upload

Following up on some older feature requests. The current message for observations with no media or lacking an ID is:

Observations without media will not be visible by default in searches, and those without any identification may not be seen by experts looking for specific taxa. Even a very coarse identification like “plants” can help a plant expert find your observation.

This one’s a bit more helpful now as far as explaining why these might be problematic. But I agree it’d be great if it were a bit more specific to the actual situation.

(For observations with no date or no location, the message is still the same as in your post, and the new message is displayed if there is no media or ID and the date or location is missing.)