Fix iframes from Embedding being reloaded when switching to catalog.

src/General/Index.coffee

@@ -11,6 +11,8 @@ Index =
 
     return unless Conf['JSON Index']
 
+    @enabled = true
+
     Callbacks.Post.push
       name: 'Index Page Numbers'
       cb:   @node

src/Linkification/Embedding.coffee

@@ -55,6 +55,7 @@ Embedding =
     embed.dataset[name] = value for name, value of {key, uid, options, href}
 
     $.on embed, 'click', Embedding.cb.click
+    $.on d, 'IndexRefreshInternal', Embedding.cb.catalogRemove.bind(embed) if Index.enabled
     $.after link, [$.tn(' '), embed]
 
     if Conf['Auto-embed'] and !Conf['Floating Embeds'] and !post.isFetchedQuote
@@ -146,6 +147,12 @@ Embedding =
 
       return container
 
+    catalogRemove: ->
+      isCatalog = $.hasClass(doc, 'catalog-mode')
+      if (isCatalog and $.hasClass(@, 'embedded')) or (!isCatalog and $.hasClass(@, 'embed-removed'))
+        Embedding.cb.toggle.call @
+        $.toggleClass @, 'embed-removed'
+
     title: (req, data) ->
       {key, uid, options, link, post} = data
       {status} = req