1. Upgrade mintty to 2.8.4 (2.8.2, 2.8.3).
2. Fix cmdtool wstartex path issues (detail).
3. Use mintty_options in run-wsl-file.exe and vim.exe.
4. Remove wpath and install cbwin subcommands of cmdtool.

If your wsl-terminal version number is higher than 0.8.0, can upgrade it with ./cmdtool update (usage).