* Try to allow chained promotion picking
* Reorg PromotionPickerScreen into own package
* Draft for new PromotionTree
* Change PromotionPickerScreen to use new tree (picking still not done)
* Finish new PromotionPickerScreen - code
* Finish new PromotionPickerScreen - assets and linting
* Finish new PromotionPickerScreen - polish positioning and lines
* Finish new PromotionPickerScreen - fix sound
* Finish new PromotionPickerScreen - little optimization
* Finish new PromotionPickerScreen - emphasize line along path
* Finish new PromotionPickerScreen - merge fix
* Finish new PromotionPickerScreen - address comments
* Finish new PromotionPickerScreen - fix sort and update wiki
* Refactor: Format JSON
* Change button hover color to be darker
* Refactor: Change disabled buttons to always look disabled, even if they don't have the default style
* Make disabled style a little grayer
* Refactor: Make addCloseButton not start a new row
* Refactor: Remove "...inRow" popup button methods & add button style parameter
* Reorder "ok/cancel" popups to have "ok" on the right side
* Fix pointer enter/exit events being disabled by default
* Fix equalizeLastTwoButtonWidths not setting the cells to be equal size
* Change YesNoPopup to ConfirmPopup
* Add ConfirmPopup to deletion of save files