v1.0.08 update

- (Bug) Sound Test was accessible even when it wasn't purchased in the Shop.
- (Bug) Upon leaving the Sound Test, the Title bgm was not restored.
- (Bug) Scanlines caused the game to rescale incorrectly on displays with different resolutions. The screen size is now handled a little differently when calculating the final scanline output.
- (Bug) Switching between fullscreen and windowed mode with scanlines active sometimes caused the screen to be resized incorrectly.
- (Bug) Starting the game with scanlines active sometimes caused the screen to be resized incorrectly.
- (Bug) The gallery numbering began with 0. It now begins with 1.
- (Bug) The gallery's final image was not displaying.