Fixed repair functions for when there is only a pillaged road

Avoid ANRs when opening civilopedia

By SomeTroglodyte:
- Fix Future Tech not counting for Contest Technologies quest 
- Fix ImprovementPicker not offering Improvements needing a removal 

Reduce autosave memory spikes - By mvanhorn

AI: Better picking of next unit to construct - By WhoIsJohannes

Crude mod author block list - By unciv-loof

Fixed crash when activating 2 cityscreen arrow buttons at the same time