Fix history search stepping back on every key.
Fix history search stepping back on every key.

urbit/archaeology-factor,urbit/archaeology-factor,chc4/urbit,rsaarelm/urbit,urbit/archaeology-factor,urbit/archaeology-factor,urbit/archaeology-factor,rsaarelm/urbit,urbit/archaeology-factor,chc4/urbit,chc4/urbit,chc4/urbit,rsaarelm/urbit,chc4/urbit,rsaarelm/urbit,urbit/archaeology-factor,rsaarelm/urbit,chc4/urbit,rsaarelm/urbit,urbit/archaeology-factor,chc4/urbit,rsaarelm/urbit,chc4/urbit,chc4/urbit,urbit/archaeology-factor,rsaarelm/urbit,chc4/urbit,urbit/archaeology-factor,rsaarelm/urbit,rsaarelm/urbit