_autoSelectCondition() {
    return this.autocomplete === 'both' || this.autocomplete === 'inline';
  }
When this condition is false, an end user will have to manually select a suggested
option from the list (by default when autocomplete is 'none' or 'list').
For autocomplete 'both' or 'inline', it will automatically select on a match.
@overridable
@protected