Matx Enable the search for everything.

function matx_modify_search_form_for_widget($form){
    $form = '<form role="search" method="get" id="searchform" class="search-form" action="'.esc_url(home_url('/')).'" ><div class="mdl-textfield mdl-js-textfield"><input type="text" name="s" id="searchform-field" class="mdl-textfield__input" value="'.esc_attr( get_search_query( ) ).'"><label class="mdl-textfield__label" for="searchform-field">'.esc_html__('Search', 'matx').'</label><button class="mdl-js-button mdl-button--fab mdl-js-ripple-effect search-submit"><i class="zmdi zmdi-search"></i></button></div></form>';

    return $form;
}