2.6

Additions
- Added timer above building when its being attacked by a barbarian
- Added recall legion button to barracks info panel

Changes
- Cards panel category buttons now display total in that category

Fixes
- Fixed image of Mars not showing in senate info
- Fixed tribute hall panel showing suburbs having 0 of a commodity
- Fixed world end panel not showing when logging into an ending world
- Fixed epoch rewards panel not being closable
- Fixed wall placement highlight display in forts