✨ New features
- Make the loading screen customizable, with background, logo, loading progress bar:
- Allow to choose the style of the GDevelop logo (light, dark, colored or plain)
- Allow to choose the background color and an optional background image
- Allow to choose the size of the progress bar (with a minimum and maximum size)
- Allow to choose the duration of the fade in animations and the minimum time the loading screen is shown
- Use the new preview button in the game properties dialog to run a preview with the loading screen shown
🐛 Bug fixes
- Fix increasing size of the project file whenever changes on a layer were cancelled
- This was because of a duplication of the "cameras" stored in the layer.
- Also add a check to clean project files with the problem.