Why should left and right keys trigger autocomplete search?

Why should left and right keys trigger autocomplete search?

Can we ignore the left and right keys or make it an option to have these keys trigger the search action? It seems strange that moving the cursor left or right would trigger it.

Add:
  1.                 case keyCode.LEFT:
  2.                 case keyCode.RIGHT:
just before
  1.                 case 16:
  2.                 case 17:
  3.                 case 18:
  4.                     // ignore metakeys (shift, ctrl, alt)
in the _create function.