How to swap "-" with "+" for Accordion item?
.mfn-acc .question .title > .acc-icon-plus { display: block; }
.mfn-acc .question .title > .acc-icon-minus { display: none; }
.mfn-acc .question.active .title > .acc-icon-plus { display: none; }
.mfn-acc .question.active .title > .acc-icon-minus { display: block; }