Make no-match more user friendly

[fgosfacdjtq]

When the option mustMatch is true and the user enters some text that doesn't match any fields the search result box disappears almost instantly (200ms). This instant disappearance can signal an error to the user. It would be better if the search field was highlighted red, and the search result box faded out slowly.

[agarzola]

Thank you for the suggestion, fgosfacdjtq!