Write Japanese: Kanji and Kana

Jul 1, 2019

- Tracing mode now shows you better feedback on why a character was marked as incorrect, the Same feedback as main mode.
- Improved recognition of certain similar characters: ね vs れ, ぬ vs め, ま vs も.
- More useful data recorded when users submit an Override Character feedback.
- Improved accessibility.
- Fix bug where edited custom character sets could miss changes until activity restart, on some devices.