魔改-《直达底部按钮》

修改rightside.pug

路径： [BlogRoot]\themes\butterfly\layout\includes\

button#go-up(type="button" title=_p("rightside.back_to_top"))
  i.fas.fa-arrow-up

+button#go-down(type="button" title="直达底部" onclick="btf.scrollToDest(document.body.scrollHeight, 500)")
+  i.fas.fa-arrow-down