Fixed secondary districts not showing up.
Compiled all secondary district deposit into a single master deposit.
Added functionality to disable secondary districts.

Primary district deposits now provide other benefits when primary districts are turned off.

Added options to disable primary districts.

Updated the feature disabling event chain so farming district deposits also get changed.
Changed some vanilla scripted triggers based on Inny [The Merger]'s recommendation.

Fixed a bug that prevented machine empires from building nexus districts.