IME icon by language; fixed a bug where text input field would not reset IME when it has been deactivated

assets/keylayout/zh_tw_cangjie5.ime

@@ -271,6 +271,7 @@ let getCandidatesUsingBuf = () =>  {
 }
 return Object.freeze({"n":"五倉正體 Qwerty","v":"many","c":"CuriousTo\uA75Bvald, 倉頡之友 。馬來西亞  http://www.chinesecj.com","m":"candidates",
 "t":states.keylayouts.map(it => [(it[2]||it[0]),it[1]]),
+"l":"zhTW",
 // return: [displayed output, composed output]
 "accept":(headkey,shiftin,altgrin)=>{
     let layer = 1*shiftin// + 2*altgrin