chord_composer: do not clear the chord when a non chording key is down.
chord_composer: do not clear the chord when a non chording key is down.

Prcuvu/librime,rwduzhao/librime,kionz/librime,jakwings/librime,Prcuvu/librime,Prcuvu/librime,j717273419/librime,rime/librime,bygloam/librime,j717273419/librime,rime/librime,kionz/librime,Prcuvu/librime,jakwings/librime,j717273419/librime,rime/librime,kionz/librime,kionz/librime,bygloam/librime,rwduzhao/librime,jakwings/librime,rwduzhao/librime,Prcuvu/librime,bygloam/librime,rime/librime