debounce auto searching a bit
debounce auto searching a bit

Wait 100ms after a keypress for more keys to come in before we dispatch
a new search.

wfxiang08/livegrep,wfxiang08/livegrep,paulproteus/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,lekkas/livegrep