- Improved the under-city detection logic that should ensure only 1 under-city is present in a region at a time.

- Updated how the MCT settings are loaded so that the campaign no longer needs to be reloaded for changes to the settings to take effect.

- Corrected the name of a duplicate listener.

- Moved the Enable Occupation Dilemma MCT setting to the correct category.

- Updated some mod logic, no significant changes should be noticeable.
- Added the Enable Occupation Dilemma MCT setting.
- Corrected a bug with the Expansion Bonus MCT setting.
- Disabled the feature that reserves a ruin for an under-city (when declining the dilemma), once occupied. I suspect this was causing occasional issues that were hard to track down.

Re-saved pack for patch 4.1. No changes made.

- Reworked, updated, and optimized the expansion using code from the more recent mods in this mod series.
- Added MCT integration.
- Possibly addressed a bug where a single under-city would grow much larger than it should.

- Created and introduced a sorted_pairs() function that should prevent multiplayer desyncs caused by the game state becoming divergent when looping over a dictionary table.