Rescale pop issues using reform + party policy total

[wvpm]

#734 split up reform and party policy support and rescaled them individually.
For UI purposes, they are combined and should be rescaled as one.

[Spartan322]

Got over 300 new errors introduced by this, eg:

[2026-05-23 18:33:28.222] [error] [ArtisanalProducer.cpp:440] Attempted to subtract more 0.0216827392578125 of 18 from artisan stockpile than it has 0.02166748046875.
[2026-05-23 18:33:28.222] [error] [ArtisanalProducer.cpp:440] Attempted to subtract more 0.282867431640625 of 18 from artisan stockpile than it has 0.2825927734375.
[2026-05-23 18:33:28.222] [error] [ArtisanalProducer.cpp:440] Attempted to subtract more 0.3484649658203125 of 18 from artisan stockpile than it has 0.3478240966796875.
[2026-05-23 18:33:28.222] [error] [ArtisanalProducer.cpp:440] Attempted to subtract more 1.0259857177734375 of 18 from artisan stockpile than it has 1.0245361328125.
...