More colonist slots
LV1 sector base colonist slots are increased to 2 (was 1)
LV2 or higher sector base colonist slots are increased to 4 (was 2)
LV1 water sector base colonist slots are increased to 2 (was 1)
LV2 water sector base colonist slots are increased to 3 (was 2)
LV3 water sector base colonist slots are increased to 4 (was 3)
each happiness building of happiness slots are increased to 8 (was 2)
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