Fix #11 - backspace does not work under Capslock English mode.
Fix #11 - backspace does not work under Capslock English mode.

tjjh89017/PIME,shaunstanislaus/PIME,chewing/windows-chewing-tsf,blmlove409/PIME,jrjang/PIME,jrjang/PIME,divazone/PIME,tjjh89017/PIME,Chocobo1/windows-chewing-tsf,chewing/windows-chewing-tsf,divazone/PIME,shaunstanislaus/PIME,divazone/PIME,blmlove409/PIME,Chocobo1/windows-chewing-tsf,Chocobo1/windows-chewing-tsf,tjjh89017/PIME,shaunstanislaus/PIME,blmlove409/PIME,jrjang/PIME