Closes#4719
More groups can be added to the enum, and re-defined via their type-char column.
Updating translations will automatically add those types to the list of translatables.
Fixes the Dark Mode bug where the first tab of the Event flag/work editor (LGPE) didn't respect dark mode; now that all all event editors are sub-tabbed, we use the workaround present in all (on shown flip back to the first tab).
Add setting to skip the unsaved entity check
Add setting to skip the overwrite? prompt and always call Save As
Change Overwrite prompt to have distinct buttons rather than rows that can be mis-clicked.
fix some comments/strings from Pokemon=>Pokémon
add some underline shortcut key for main menu for English translation
Allows specifying Dark mode in settings now.
Extracts reusable settings objects to PKHeX.Core (drawing/GUI stuff kept in WinForms).
Updating settings now refreshes backup paths/mgdb
