Fix the printing of active mods for blueprint loading

[lL1l1]

Issue

With the changes to the repr function, it no longer automatically unfolds tables, which made the "mods for blueprint loading" message unreadable.

Description of the proposed changes

This replaces the repr with the printing used in SessionInit.lua.

Testing done on the proposed changes

Loading a game with some unit mods like total mayhem logs the mod information.

Checklist

• Changes are documented in the changelog for the next game version