Hotfix 0.2.3

[Added] Saving icon

[Fixed] Flag stay in place after upgrade Market [Fixed] Unisex sign stay in place after upgrade WC [Fixed] Employees fill vending machines with bears [Fixed] Dog food does have negative profit [Fixed] Saving cause crash sometimes [Fixed] When employee fill a candy machine removes 1x from box but added 100x to machine [Fixed] Builders upgrades does not take money [Fixed] Trashes throwed to trash can play sound more than once sometimes [Fixed] When save loaded if any vehicle is on sale put to sale sound plays [Fixed] Bed timers does not saving

[Performance] Save system improvements [Performance] Memory improvements