Automated units don't try and conquer the same city twice

Constructed units that can't be placed are put on hold till the next turn

Solve 'desktop tries to create window of size 0/0' bug

Remove old tag function

get tag from github actions, the 2022 way

By SomeTroglodyte:
- Civilopedia Welcome, moddable 
- Fix ColorMarkupLabel prefSize 
- Untinted embedded symbols - Notifications and Citystate diplomacy 
- Fix disbanding units a civ cannot afford 
- Main menu cancels background map creation when obsolete 

Make AI buy city tiles.  - By WhoIsJohannes