Riichi Mahjong Calculator

Massively improve performance.
Fix random UI freezes/crashes.
Startup times nearly halved upon initial startup. Startup times after initial startup are <2 seconds.

This release marks a huge internal restructuring of the UI components and the enabling of "markingMode: none".

If you've had issues with the clunkiness but enjoy the core functionalities of the app, please try it out again. Thank you everyone for using the Riichi Mahjong Calculator.