SearchBox autocomplete retains previous recommendations

[kevindenham]

The autocomplete suggestions on the default search box are not removed/hidden when the minimum suggestion input length is not met once a set of suggestions has already been shown.

To replicate:
Add the search box to a page with default settings
Type a word with a minimum of 3 letters that contains matching content in the search index
Delete the text in the search box
Begin typing again but only input 1 or 2 letters

Example: (see screen cap)

What occurs is that the previous autocomplete constructor and result dataset is used to make suggestions rather than waiting for the minimum suggestion input length to be hit again.

This could potentially be even more confusing if the suggestion minimum is increased in the widget designer as users would see incomplete suggestions since the index is not requeried.

Possible fix:
feather-widgets/Telerik.Sitefinity.Frontend.Search/Mvc/Scripts/SearchBox/Search-box.js