Multi-step zoom!

Hello everyone! You no longer have to go into the settings to change the zoom; you can now zoom in smoothly up to 6 times by default! Please let me know if that broke anything, because it's quite a big change. I also added a small change that improves touchscreen behaviour on the Steam Deck. Except for zooming in and out, the game is now fully playable by only using the touch screen. Night Mode will come at a later point. Based on your comments it made more sense to add improved zoom first. Peace & Love Patrick