Auto-scroll to selected conversation when reordering them (#2498)

When conversations are reordered (last message time has changed), this commit leads to scrolling the shortest distance to the conversation.

js/views/conversation_list_view.js

@@ -47,6 +47,12 @@
         var target = this.$('.' + targetConversation.cid);
         $el.insertAfter(target);
       }
+
+      if ($('.selected').length) {
+        $('.selected')[0].scrollIntoView({
+          block: 'nearest',
+        });
+      }
     },
     removeItem: function(conversation) {
       var $el = this.$('.' + conversation.cid);