[diet] drop pre 3.6 API compatibility (but attempt to keep data cmopatibility). Closes #2017916 notice drop of the .paginable property necessary for 'paginable' affectation as done in the forthcoming table views refactoring

$(document).ready(function() {
    $('a.rhythm').click(function (event){
        $('div#pageContent').toggleClass('rhythm_bg');
        $('div#page').toggleClass('rhythm_bg');
        event.preventDefault();
    });
});