Special force [undefined] in tour firebase page

I'm only early into buying upgrades so there could be more. free-cities-20210125-165844.save

@lowercasedonkey

Not really your domain, but another print macro needing replacement.

The underlining issue is that there was nothing for App.SF.UnitText to return if certain upgrades are zero, this was fine previously as the null/undefined output was not render but that is now the case.

mentioned in merge request !8781 (merged)

mentioned in commit 8c1f0b7c

closed with merge request !8781 (merged)