bubble: Stop appending to parent element when hidden.

This avoids unintentional styling of bubble content within the parent
element when it is supposed to be hidden.

r2/r2/public/static/js/multi.js

@@ -161,7 +161,6 @@ r.multi.SubscribeButton = Backbone.View.extend({
             group: this.options.bubbleGroup,
             sr_name: this.$el.data('sr_name')
         })
-        this.$el.append(this.bubble.el)
     }
 })
 

r2/r2/public/static/js/ui.js

@@ -229,7 +229,6 @@ r.ui.Bubble = Backbone.View.extend({
             this.options.group.current = null
         }
         this.$el.hide()
-        this.$parent.append(this.$el)
     },
 
     hide: function(callback) {