增加控制樱花特效开启按钮，待解决首次进入页面需要点击两次才能控制的问题

themes/butterfly/layout/includes/rightside.pug

@@ -29,14 +29,14 @@ mixin rightsideItem(array)
         if commentsJsLoad
           a#to_comment(href="#post-comment" title=_p("rightside.scroll_to_comment"))
             i.fas.fa-comments
-      when 'xxxx'
-        button#xxxx(type="button" title="测试按钮")
-          i.fas.fa-xxxx
+      when 'sakura'
+        button#toggle_sakura_btn(type="button" title=_p("rightside.toggle_sakura"))
+          i.fas.fa-seedling
 
 #rightside
   - const { enable, hide, show } = theme.rightside_item_order
-  - const hideArray = enable ? hide && hide.split(',') : ['readmode','translate','darkmode','hideAside', 'xxxx']
-  - const showArray = enable ? show && show.split(',') : ['toc','chat','comment']
+  - const hideArray = enable ? hide && hide.split(',') : ['readmode','translate','darkmode','hideAside']
+  - const showArray = enable ? show && show.split(',') : ['toc','chat','comment','sakura']
 
 
   #rightside-config-hide