New update: changes for unit civilopedia pages
- removed promotions panel
- new panel for unique unit replacements: base units show unique units, unique units show base unit (removed text links to replacements)
- new panel for unit upgrades: displays all possible upgrades for a unit
- removed promotions panel
- new panel for unique unit replacements: base units show unique units, unique units show base unit (removed text links to replacements)
- new panel for unit upgrades: displays all possible upgrades for a unit