editor: Translate recruit list in tooltip (#3303)

src/editor/action/mouse/mouse_action_unit.cpp

@@ -18,6 +18,7 @@
 #include "editor/action/action_unit.hpp"
 
 #include "editor/editor_display.hpp"
+#include "formula/string_utils.hpp"
 #include "gui/dialogs/unit_create.hpp"
 #include "tooltips.hpp"
 #include "gettext.hpp"
@@ -59,12 +60,21 @@ void mouse_action_unit::move(editor_display& disp, const map_location& hex)
 			rect.h = disp.hex_size();
 			rect.w = disp.hex_size();
 			std::stringstream str;
+			const auto& recruits = unit_it->recruits();
+			std::vector<t_string> recruit_type_names;
+			std::transform(recruits.begin(), recruits.end(), std::back_inserter(recruit_type_names),
+				[](const std::string& type_id) -> std::string {
+					const unit_type *new_unit_type = unit_types.find(type_id);
+					if(!new_unit_type) return VGETTEXT("(Unknown unit type: $type)", { { "type", type_id } });
+					return new_unit_type->type_name();
+				}
+			);
 			str << _("Identifier: ") << unit_it->id()     << "\n"
 				<< _("Name: ")    << unit_it->name()      << "\n"
 				<< _("Type: ")    << unit_it->type_name() << "\n"
 				<< _("Level: ")   << unit_it->level()     << "\n"
 				<< _("Cost: ")    << unit_it->cost()      << "\n"
-				<< _("Recruit: ") << utils::join(unit_it->recruits()) << "\n";
+				<< _("Recruit: ") << utils::join(recruit_type_names) << "\n";
 			tooltips::clear_tooltips();
 			tooltips::add_tooltip(rect, str.str());
 		}