enable printouts in ajax queries

[krabina]

Similar to #359 and #361, ajax queries do not support printouts in queries.
Example: https://maps.extension.wiki/wiki/User:Krabina
Berlin show the population. As soon as the map moves around, ajax query is used that does not feature printouts. I tried do put
| ajaxquery = [[Category:Cities]] |?Population and other variants (like | ajaxquery = [[Category:Cities]] ?Population , but this did not work out of the box.