Clean up UI, work on tutorial

src/ScriptEngine.cpp

@@ -657,6 +657,18 @@ namespace ZL {
                 return this_impl->questJournal->setActiveObjective(questId, index);
             });
 
+        api.set_function("call_tutorial_taxi_required",
+            [game]() -> void {
+                if (game->onPlayerTaxiRequired)
+                {
+                    game->onPlayerTaxiRequired();
+                    game->onPlayerTaxiRequired = nullptr;
+                }
+				else {
+					std::cerr << "[script] call_tutorial_taxi_required: function is empty\n";
+				}
+            });
+
         lua.script_file(scriptPath);
     }