Fix: halo (if any) remains when wesnoth.put_recall_unit() is used

Based on the suggested fix in #3425. Closes #3425.

(cherry-picked from commit 46bec21)

src/scripting/game_lua_kernel.cpp

@@ -2213,8 +2213,11 @@ int game_lua_kernel::intf_put_recall_unit(lua_State *L)
 	t.recall_list().erase_by_underlying_id(uid);
 	t.recall_list().add(u);
 	if (lu) {
-		if (lu->on_map())
+		if (lu->on_map()) {
 			units().erase(u->get_location());
+			resources::whiteboard->on_kill_unit();
+			u->anim_comp().clear_haloes();
+		}
 		lu->lua_unit::~lua_unit();
 		new(lu) lua_unit(side, uid);
 	}