[Unknown Mod][Locations] Hero can choose to recruit base or upgraded creatures in some creature generators on the adventure map

[LeHerosInconnu]

The hero can choose to recruit the base creatures or the upgraded creatures in the creature generators on the adventure map once the guardians are defeated (Troll Bridge, City of the Dead, Dragon City).

When the hero is positioned on the location's active square and he validates to recruit creatures, the left and right arrows on both sides of the creature sprite are displayed to allow to select the base creature or the upgraded creature (as in the recruit window in a castle where upgraded dwellings have been built).
The recruit window displays the usual creature by default.

In fheroes2:

Creature generators on the adventure map, where base or upgraded creatures can be recruited:

• Troll Bridge
  Allows to recruit Troll (by default) or War troll.
• Dragon City
  Allows to recruit Red Dragon (by default) or Green Dragon or Black Dragon.
• City of the Dead
  Allows to recruit Power Lich (by default) or Lich.

This is an option:
"Locations: Hero can choose to recruit base or upgraded creatures in the creature dwellings of the adventure map"
Ot it can be implemented without being an option, as the player can simply ignore the feature to have the same experience as the original game.
This can be implemented directly in fheroes2.

Note: all of this could eventually change.