fix a serious bug that Vomnibar may get shorter input url than what users type
fix a serious bug that Vomnibar may get shorter input url than what users type

this bug is caused by the commit reworking @onInput,
  which was to reduce count of omni completion queries

gdh1995/vimium-plus,gdh1995/vimium-plus,gdh1995/vimium-plus