Changes:
- Changed scenes, now they are more informative and beautiful (closes 6)
- Check if sector is alive in Nested attacks (closes 5)
- Now tag PRNG detected at sector, where key is available (fix not working with dead 0 sector, closes 4)
- Detect hard PRNG from start, hardnested doesn't require calibration now
- Settings menu: ability to always run Hard Nested (regardless of PRNG)
- Minor code refactoring, a lot of bug fixes (memory leaks, stability improvements)
- Fallback to Hard Nested now after 25 failed tries (was 10)