Add bootstrap icon and clear button for search text box
Add bootstrap icon and clear button for search text box

Avoided editing CSS. Pure JS implementation.

@TODO: Add invert colour class for dark themes.

chitza/docstrap,obimod/docstrap,luckylooke/JS.Responsive.jsdocTmpl,radio24syv/docstrap,mar10/docstrap,robotlolita/docstrap,pocesar/docstrap,chitza/docstrap,hsrobmln/docstrap,leahciMic/docstrap,jraller/docstrap,lightsofapollo/docstrap,docstrap/docstrap,TitanNano/docstrap,fisch0920/docstrap,zech/docstrap,bartvanandel/docstrap,terryweiss/docstrap