* Add replacement training_mod_tui crate
* Begin work on converting over to byteflags
* Allow StatefulTable.iter_mut()
* Additional merge work
* Fixing more compile errors from the merge
* Replace training_mod_tui with training_mod_tui_2, update byteflags dependency for random selection
* Fix button_config, hero buffs, caps issues. Move button logic into App
* Restore some functions that I cut too agressively
* Move to_vec into byteflags crate
* Fix src/training/ui
* Set `_` match arms on byteflags to `unreachable!()`
* Fix final few compiler errors
* Run formatter
* Reconsider whether unreachable parts are actually unreachable
* Adjust logging and remove dead code
* Fix some menu bugs
* Adjust icon sizes
* Separate checkmark from is_single_option
* Allow fast increment / decrement of slider handles with up/down
* Allow resetting current menu
* Change button behavior: `R/Z` now resets either the whole menu or the selected submenu depending on app.page, and `Y` now clears the current toggle so you don't have to press A six times. Only show keyhelp for `Y` if its relevant.
* Remove unneeded command line interface
* Take care of some minor nomenclature TODO's
* Increase stack size for menu::load_from_file() to avoid crashes
* Implement confirmation page before restoring from defaults
* Run rustfmt
* Fix warnings
