Decay Tree Hack 2.2 + Redeem Codes

In this version the database has been expanded to include decay modes taking multiple steps at a time. New features also include:
- A new hierarchal view mode
- A branching ratio slider, to highlight the most probable decay paths
- Continuous spectrum graphs
- Spontaneous fission fragments for some isotopes

In addition, some visual bugs have been fixed.

Implemented Dark Mode

New in 2.0:
- 450+ isotopes added to the database
- table of emitted particles added with energy and emissions per decay
- isotope properties added: spin, parity, branching ratio, specific activity and natural abundance

New in 1.1:
- Added color and symbol explanations to first page and through a quickly accessible info-button
- Polished the nuclide details text
- Remapped the half-life colouring scheme
- Fixed trees that grew out of the screen
- Fixed nuclide overlaps
- Fixed decay mode symbol misplacements
- Fixed slow loading and crashes on bigger trees