Display a warning when reaching physical limits of max table size / sequence IDs

When a table reaches close to 2 billion IDs in use (which could happen after a few years of use), display a warning in the administration.

Without any information:

Upon reaching 2% of the max, we just display the number:

Upon reaching 20% of the max, we display an error:

Upon reaching 50% of the max, we display "Danger" to trigger a sense of urgency: