Added kana support notification to dashboard for Japanese users.
Hooked up kana notice and settings toggle to proper download action.
Updated dialog icon and enabled notice on all platforms.
Hide master account reset button from all by my accounts.
Scale down long character defn and rdng display more aggressively.
Show full vocab reading when studying kana is not enabled.
Fixed issue with zhuyin not displaying on defn prompts when enabled.
Updated styling on reading and writing blocks for better consistency.
Fixed issue with duplicate reading displaying on kana-only rdng prompts.