Add AI for land-based nuke units

Keep opened mods open and at top of list when reloading mods in 'locate mod errors' tab

above/below HP conditionals work outside of combat

update uniques upon taking damage and other situations

By SomeTroglodyte:
- New notifications bell icon with actual count
- Fix TabbedPager geometry - the cell for the close button needs to be ignored in the rest of the Table!

Added ConditionalAboveHappiness unique - By PLynx01